Here are the part numbers I used for my rebuild. The auger bearings are a greaseable bearing with collar in a cast iron housing. I didn't need u-joints or a sprocket so I don't have those numbers. Site sponser, Mark Hellrung (Yosemite Sam) has everything you need at good prices too if your interested.
If you need new gearbox shafts or a transfer shaft, Jeffinpa makes great reproductions.
parts by Jeff
Transfer shaft- Torrington B-1210 OH
Auger- SBTRD205-16G
Gearbox inner bearing- General-R12
Gearbox outer bearing- IDC-1630 2RS
Gearbox seal- TCM-07162TB-H-BX
BTW welcome to OCC! (I see it's your first post)
Bill
Edit: awe fer crying out loud Jon, that's what I get for proof reading.