We've got all the balls in all the sizes for the Tamiya (and pretty well every other) cars 511, 201 and the touring cars.
If you're quick we have the new 620 HC thrust races for the 511 which have seperate plates not the caged ones, and the diff plates to suit. AND all the lubes to build a silky smooth diff.
rcLazy is your one stop diff shop
Just drop us an email/pm or visit the awe inspiring website.
Cheers
Mark