I know that there are a few electric PC-9s out there but if I were you and I had some cash I would get a Seagull and convert it to electric. There is plenty of space in there to stick lipos or nicads. I would have done so myself but I don't have the cash to do a one off payment on the motor/esc and lipos. After a while though you will save money over buying glow fuel and time over having to clean the damn thing every day you go flying. And if your moving onto a P-51 at least you will have some experience on a bigger than usual electric.