[Spihc]

37t pulley
http://cgi.ebay.com/Tamiya-54023-Opt...0|293:2|294:30

Rear white wheels
http://cgi.ebay.com/Tamiya-51321-Spa...1|293:2|294:30

Front white Wheels
http://cgi.ebay.com/Tamiya-RC-TRF501...1|293:1|294:50

501x Diff joints
http://cgi.ebay.com/Tamiya-TRF501X-D...3286.m20.l1116

Or you can go to Racing Factory (Finland) and buy all you need from them. (Amazing fast shipping).
http://www.racingfactory.fi/products...a-parts?page=1