Yo

You might try hobby partz, Tower is always a reasonable and reliable source. Grayson Hobby has also been fine for me. Don't try to reinvent the wheel, you will get run over. Go to the builders information, and use their recommended motor and controller. If they are overpriced, get their motor's specks for weight, Watts and KV and match that as close as possible. There is good and there is cheep, seldom are they the same. You need to spend the day in research learning the electric stuff starting with Red Schoefields "Battery Clinic" ad go from there. You must either pay your dues or pay and pay until you learn the basics yourself. There is always someone in the club that knows their stuff and willing to help out. Make him/her a friend and respond in kind. You can always go mow their lawn in gratitude. If you can't find someone to help you, the problem may be in the mirror. ENJOY