Anything advertised as G7 or G7 Fly compatible will work in your Gat. The Gat is a customized 06 Speed, which is a G7 Fly with a stripped down circuit board. For parts,
www.fixmyangel.com and
www.pbsports.com should be your first 2 stops. If you can't find what you need there, you'll probably have to try and find it used.