Picture 1 is the costume I made and picture 2 is the actual costume from the film.
I made this costume from a self drafted patterns. I used a book called Metric Pattern Cutting for Menswear by Winifred Aldrich (https://www.amazon.co.uk/Pattern-Cutting-Menswear-Winifred-Aldrich/dp/1405182938/ref=mp_s_a_1_1?dchild=1&keywords=winifred+aldrich&qid=1617566759&sprefix=winifre&sr=8-1) For this costume I drafted a historical frock coat, trousers waistcoat and shirt. I drafted basic blocks from this book and adapted them to what I needed.
The jacket is made from a checked wool and the trousers are made from a striped wool. The waistcoat is made from a black and silver floral brocade and the shirt is made from turquoise cotton. All these fabrics came from Minerva crafts. The neck tie is a black Liquorice allsorts pattern cotton that came from Etsy.
The trousers feature embroidery on one of the legs and the coat and waistcoat feature pockets.
This costume was made for my final major project at university and it turned out really well and I am sooo proud of what I accomplished with this costume!
I made these from a self drafted patterns. I used a book called Metric Pattern Cutting for Menswear by Winifred Aldrich (https://www.amazon.co.uk/Pattern-Cutting-Menswear-Winifred-Aldrich/dp/1405182938/ref=mp_s_a_1_1?dchild=1&keywords=winifred+aldrich&qid=1617566759&sprefix=winifre&sr=8-1)
The shirt is made from white satin from fabric land and features a collar and button stand.
The grey top is made from a ribbed jersey from fabric land and features a collar and centre front zip.
The waistcoat is made from black and silver floral brocade and polyester lining from Minerva Crafts and features 4 pockets in the front.
I am a fairly experienced sewer so these was pretty easy to make and was all loads of fun to make. My boyfriend absolutely loves them!!
Definitely look into vintage patterns then. They usually have much nicer details than what's currently available. You may still have to alter the pattern to fit you since many vintage patterns are smaller than current ones are. Plus size women's patterns are just as blocky and potato sack as plus size men's patterns. Do they think that plus sized people don't require professional clothing, have jobs or attend events they need to dress for?
Winifred Aldrich's Metric Pattern Cutting was suggested in this thread, but she has also written a book for menswear. I think that would be more appropriate for you. It uses metric measurements, but really, it's just a unit of measure. I'm American, but prefer metric because it's more accurate. Here's the Amazon link. I hope that helps you find something that fits you well.
Oh don't worry, a decent amount of professional pattern cutting is copying some vintage (or sometimes not vintage) garment anyways. I think copying clothes is a great way to start learning.
If you decide to learn, I've heard good things about the books by Winifred Aldrich. I use the Muller and Sohn books, but they're quite a bit more expensive.
If you ever need any help with patterns or making stuff feel free to DM me, I always like seeing other peoples work!
I made this jacket from a self drafted pattern. I used a book called Metric Pattern Cutting for Menswear by Winifred Aldrich (https://www.amazon.co.uk/Pattern-Cutting-Menswear-Winifred-Aldrich/dp/1405182938/ref=mp_s_a_1_1?dchild=1&keywords=winifred+aldrich&qid=1617566759&sprefix=winifre&sr=8-1)
For this jacket I used dark blue denim with a light blue stripe in it. I also used light blue denim. Both fabrics came from Minerva Crafts.
The fronts and the bottom of the back is made from the dark blue striped denim and the top of the back and the sleeves are made from the light blue denim.
This jacket includes a stand collar and two slit pockets on the inside of the front and two pockets in the side seams.
I am a fairly experienced sewer so this jacket was pretty easy to make and was all loads of fun to make. I hope my boyfriend loves it when I can eventually give it to him!!
This jacket was made from a self drafted pattern. I used a book called Metric Pattern Cutting for Menswear by Winifred Aldrich to make the pattern (https://www.amazon.co.uk/Pattern-Cutting-Menswear-Winifred-Aldrich/dp/1405182938/ref=mp_s_a_1_2?dchild=1&keywords=winifred+aldrich&qid=1617651525&sprefix=winifr&sr=8-2) This jacket was made from a green and brown dog tooth check wool from Minerva Crafts
It features a lapel collar, green buttons and pockets in the inside.
I am a fairly experienced sewer so this jacket was pretty easy to make!
metric pattern cutting for menswear
The womenswear version is great. If the mens version is anything like it, I’d recommend it as a staple.
I made this jacket from a self drafted pattern. I used a book called Metric Pattern Cutting for Menswear by Winifred Aldrich (https://www.amazon.co.uk/Pattern-Cutting-Menswear-Winifred-Aldrich/dp/1405182938/ref=mp_s_a_1_1?dchild=1&keywords=winifred+aldrich&qid=1617566759&sprefix=winifre&sr=8-1)
For this jacket I used green cord and black denim for the outside of it. Both of these came from Minerva Crafts. The inside of the jacket is lined with more of the green cord and black fleece to make it nice and warm. The fleece also came from Minerva Crafts.
The buttons are black with a crown design on them and I got them from Amazon (https://www.amazon.co.uk/gp/aw/d/B07HDGJP64?psc=1&ref=ppx_pop_mob_b_asin_title)
This jacket includes a collar and two patch pockets.
I am a fairly experienced sewer so this jacket was pretty easy to make and was all loads of fun to make. I hope my boyfriend loves it when I can eventually give it to him!!
Menswear is not an area that is specifically covered by itself very often. However, most of the techniques are the same as for womenswear; except for trouser construction I think.
My absolutely favourite book is this one. Yes, it is aimed at women but the techniques of putting together shirts and shorts will be the same. What I particularly like about the book is that has exceptionally clear explanations of how to do things and the colour photos (not drawings) are all clearly labelled so you know exactly what you are supposed to be looking at.
All the big pattern companies have menswear sections and they can be found here and here. When you reach the point where you feel comfortable drafting your own patterns, Winifred Aldrich has a reliable book. It is not imaginative, nor on the cutting edge of fashion but it will help you produce good fitting patterns that you can adjust and change as you see fit.
This site is set up for costumers but it contains a wealth of useful sewing information.
As for the best place to buy supplies, you are probably best to let us know what city you live in.
Good luck and don't forget to post photos.