That I know there is a tutorial for replacing the board. This is for an evo but with a little digging you could. I forget where I ordered my board, but they were cheaper than a real kyosho board and had upgraded FETs. I will look in my old email account to see if I can find a receipt. It was like $40 tops.
Here is the video/tutorial
https://youtu.be/BJWxFzgl9WI
You could always look at WLToys A949. See if those electronics would work for your needs.