Well, I got a reply from RC4WD about the gears- they said they can give me $10 off the cost of a full set, but they dont sell them seperately. Guess that'll have to do really, as UltraMaxxed gears are impossible to find, and even the steal rip-offs have vanished from ebay. On the upside, I think I've identified every weak point to the emaxx design now....