Why not go to the source? RC America
is the US distributor for XRay and they sell parts direct. Homer at the tiltyard has started carrying a lot of XRay stuff, but I was told most of what he has is for the 8th buggy although I'm sure he could get anything XRay has. He's very good about taking care of people and his prices are usually very good so if you are going to deal through someone, he would be a good bet.