I've ordered from ehirobo many times with no problems, also from rchelicoptershop, esky-heli, hooobby, heli-hobby, rc711... etc.

Also try ushobbysuply and ka-planes, both in the US. On ebay there's a store called "Gadgets and Collectibles Canada" contact Ken there and put the pressure on him to carry belt cp parts. Best shipping I've ever seen, never taken more than 2 days and one flat shipping fee regardless of how much you buy. Unfortunately, he only carries parts for the lama v3/v4 and king2 but the more interest he gets in the belt cp the more likely he'll carry it.