Fron the IFI website (transmission manual:
http://www.ifirobotics.com/docs/2005...nual-rev-c.pdf
the bearings are:
FAFNIR #9103KDD BEARING QUANTITY 2
FAFNIR #39KDD BEARING QUANTITY 6
I also think you will need additional nylon washers:
MSC #67353680 5/16" I.D. NYLON WASHER QUANTITY(8)
and setscrews.