manual trans parts

I'm rebuilding the engine in my '57 Belvedere. The transmission works fine, but as long as it's out, I'd like to replace seals/gaskets, etc. (It's a 3 speed manual.) Does anyone know a source for these parts? Bernbaum lists parts through '56 only. NAPA lists a rear seal and a couple of bearings. It would be nice to buy a seal/gasket kit if possible. Thanks!

try brewers im sure he can point u in the right direction if they cant cross refrence the parts

http://www.bestgasket.com/drive_train_part_info.asp?DriveTrainType=Transmission%20Set%20%28standard%29