You need to conmank any one of the regular sellers that posr here. RCTankWars, RCCommand, Mato, WelshDragon models,Dare I say Raidentech.There are some others but the prices might be a little high. Come to think of it, does HL make a PzIV, if not then you need to contack Karen at the AAF, those will be Tamiya parts. You just need too much track for most guys to have just lying around.