The Tamiya kits normally come with a VERY CRUDE drive system for free running, though you can make them R/C. Another option would be to check with the SCALE SHIPYARD. They sell fiberglass hulls and parts as well as plans for lots of different ships. Let me make one thing very clear, THESE ARE NOT A BEGINNERS PROJECT THAT CAN BE BUILT IN A FEW DAYS AND ARE THEREFORE NOT CHEAP.