In an effort to prepare for the day when I have to fix my own camera I came across the EOS 3 parts catalog in a P.O.T.N forum. Who knows if the parts will actually be available then, but at least I'll know what they're called. Now if I could only find the m-f-ing service manual. Here's the link:
There are links for other Canon cameras as well as lenses. I'm not sure how many of them are working.