Unfortunately the drift conversion kit is obsolete, so you'd have to find one used or something. Don't worry, just put hard drift tires on it and it won't do too bad...
-Bashing R/Cs since 1996-
HPI Savage S-25, Crawler King, MT2, RS4 Evo, and Sprint 2 Flux
Traxxas Summit, Mustang Boss 302, and Ken Block Fiesta