Its weird the item numbers from RcPlanet and HPI are swapped...
HPI:
#113071 - D413 SPUR GEAR (72T)
#112963 - GEARBOX SHIM SET (6PCS)
RcPlanet:
Hot Bodies Spur Gear 72T D413 HBS112963
Hot Bodies Gearbox Shim Set D413 (6) HBS113071
I just ordered a spur (this page
http://www.rcplanet.com/Hot_Bodies_S.../hbs112963.htm) and a few other parts. Hopefully I get a spur and not a shim set!