They do the thrust bearings too but there are probably cheaper on eBay.
You might need two packs if the diff axle is 1/8" (3.1mm)
http://www.ebay.co.uk/itm/BUTEE-BILL...#ht_801wt_1110
I noticed the slipper spur is a bit worn, would it take an RW supalite spur?
