Fisher AG7 on Amazon Warehouse.
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This one is $27.48 right now. Used, but very good condition.
NASA didn't even spend a million on them.
A private company made them, sold a few of them to NASA for relatively normal pen prices and then made a killing selling space pens to the general public.
You can still buy the same pens for $70.
I had one of these as a kid in the late 90s. It was the thing to have when hand writing was still important.
They are available online for around £60
What's more important than a notepad is a good pen. I like my Fisher Space Pen. But anything with a pressurized cartridge will probably do. They write on just about anything without missing a beat which is what I care about.
Yes. I have one for exactly this. A 30 dollar ballpoint pen that writes on anything, be it parchment paper prep lists that are already taped to the wall, labeling fests/inventory in the walkin freezer at 5F, recipes that have just been sprayed with nonstick spray, you name it. Their customer service is amazing and mine has been replaced free of charge after I dropped it in the kitchen and the little button didn't release the tip anymore...
That said, it's a heavy little fucker and it's super slim and smooth, and will NOT stay in your sleeve pocket if you even think about raising your arms over your head.
If you have the habit of keeping your pen in your pants or breast pocket, do it. Personally, I go insane if my pen isn't in my sleeve pocket, so the space pen stays in my bag in favor of a cheaper, chubbier, lighter weight clicky pen, and my clicky sharpie.
edit:This is the one I have.
Get the clicky version
all links on amazon, there are probbably other places to get things but i'm lazy.
Amazon is a good bet too. You can read reviews and get good prices.
https://www.amazon.ca/gp/aw/s/ref=is_s_ss_i_1_7?k=fidget+toys&sprefix=Fidget+
https://www.amazon.ca/Fisher-Space-Original-Astronaut-Pen/dp/B0015ZP2AC
It looks like a space pen or an ink less pen Space pen: Fisher Space Original Astronaut Space Pen https://www.amazon.com/dp/B0015ZP2AC/ref=cm_sw_r_cp_api_eCKMxbMRTBN4E
Ink less pen: Jac Zagoory Beta Silver An Axel Weinbrecht Design Inkless Pen https://www.amazon.com/dp/B005GLYH8O/ref=cm_sw_r_cp_api_rBKMxbSP8YVQ7