Where about in St. Louis? We have several hobby shops but telling you about one in St. Charles when you're going to be in South County is useless unless you like to drive a lot. Anyway we do have a HobbyTown USA, Hobby Lobby, Michael's and several smaller stores. None of them have anything other than estes, quest, and aerotech (hobbytown). Schaefer's is one that really caters to rc aircraft (well that and beads for jewelry) if you like that sort of thing its pretty cool.