[suicideneil]

Just about anywhere really- so long as they are 14mm & metal that is all that matters. If not your local LHS, then feebay or most online shops will carry some brand of 14mm hex- the ones for the savage, revo, maxx etc will all fit fine. The plastic ones are okay for a while, but once you start increasing the power, the retaining pin tends to shredd the inside of the hex, or the hex rounds out inside the wheel (as do metal ones if they arent tightend down fully). A larger hex like 17-23mm is best to prevent it from rounding out, but then you need an appropriate rim to go with the larger hex. Its all good fun....