So the modern alternative seems to be the Mylec Line of goalie masks. They have several variations of shaped and styles, you might try there. Here's one that comes in black and white and runs $30: Mylec Goalie Mask on Ebay
You can get pretty accurate base masks on amazon now incredibly cheaply. Like this
I think it would look good if you affixed it to a wall plaque and hung it up. Something like this?
Yes, I don't like to ride without something protecting my face. It has Velcro straps on the inside of it to attach to the face strap it came with. Here's the link for it on amazon. Amazon Mask link. You'll see why I repainted it.
I ordered it off of Amazon. I wish I had the skills to make it. It came in as a pink mask with horrible lines around the teeth so I just repainted it. (If you’re interested here’s the link for it Amazon Lock Mask
I've used a styrofoam head for some stuff that was too dangerous for my real face. You could probably even cover it with a cloth and then some plastic wrap or something if the stuff gets really nasty. Good luck!
I'd say hit up the craft store and look for an acrylic egg. Something like this. It's the right season for it with easter. If you can't find a red one try sharpie! It's low budget but it'll work.
Wonderflex is AWESOME. It's a thermoplastic, so it comes in big sheets and you cut it to size and heat it up with either hot water, a hair drier, or (what I did) a heat gun. It also sticks to itself, so if you need to make any seams or patch any holes you can just keep melting and smoothing it to make it look like one piece.
I've been making masks by building up a clay base underneath and then heating the wonderflex over it. You have to work it a lot and be careful not to melt the clay underneath too bad, but you can get some pretty good detail. I also discovered that using one of these: http://www.amazon.com/Clover-MCI-900-Mini-Iron/dp/B001CE73F8 can really help you get smooth surfaces.
It ends up being lightweight and durable (I work in costume crafts for theater so it's great for stage) and it will feel like any other plastic mask against the face, but I generally recommend foam padding on the inside of any masks regardless. :)