If you go to the Tech Page under modern improvements there are step by step instructions including seal numbers to upgrade your axle and pinion seals to modern neoprene lip seals. The pinion and carrier bearings should be available through your local bearing supplier. The axle bearings are a different story due to the fact that the bore is actually tapered to fit the axle. You can try Olcar Bearing Company or you can try to locate good used bearings from a club member.
Stan,
Try Olcar Bearing Co. Ph.# (910 693-3324)
Fax #910 693-1943
135 James Creek Rd.
Southern Pines, N.N. 28387
George Bachleda
He handels Bearings, Seals, Plus.
I just purchased Felt seals for our rear axles.
I think that Gordy Curl had aquired some bearings from him.