I bought a set of taper roller bearings for the front of my 58 model 38. I think I got it from LMC or something. It's out there in one of the parts magazines. I don't know if it is a differnt size for your 3600.

All the bearings came from Japan, but don't think they are junk because of that. Japan makes only high quality stuff now a days... all the junk is from China and Korea.