If you're not wanting/ready to play with FETs there are many members on here who would be able to do it for you as well as employees of AtomicMods. Of course this would cost you a slight fee, but you would have some of the best doing it for you.
Oh, and of course, welcome to Xmodsource.com. It's a pleasure to have another member come back into the hobby after a period of time. Glad you're still getting a kick out of these tiny RCs.