I don't understand the question or the response. Mik, you're saying Janty might make these V3 bodies with pretty colors available for buy or swap, right? What would involve any 'do it yourself' action?
You would have to move the circuit board, wiring, and atty connector from one body the next. As well as the switch, which seems to be integrated into the body (at least on v1 & v2 that I have)