He could though. If you dont do it right, it doesnt bend all the way back. The silicone may crack. I built living hinges with silicone and it isnt difficult at all. You have to have patience and use painters tape to make a nice bead of silicone.Why not just make one out of silicone
Yes, I found that site this morning as well. I actually managed to get my hands on this hinge from US Plastics the day after I posted this, but the thing is, they seem like they go out of stock left and right. So having a back-up source is always a good thing, although I got a 6' piece, so I shouldn't need it for a little while, lol.McMaster Carr is also another good site to look for things you need.