All the players have online catalogs listing millions of bearing sizes and I'm sure they have stuff not on their public web's. Search for Timken Bearings, SKF Bearings, NTN, MBS and FAG. (A German bearing mfg) Then go to there on line catalogs.

Eric
http://s1199.photobucket.com/user/sparky234/library/My%2057%20Chevy%20Stepside?sort=3&page=1
'57 Chevy 3100 (Little Red)
'81 RD350 LC - Fun, Fun, Fun
'83 GS1100E - Pocket Rocket