Some places you might want to visit:

South Bend Region SCCA -- minor waiver
SCCA National page
National Electric Cart Assoc Racing
VSCDA
Midwest Council of Sports Car Clubs

Gingerman Raceway
Berlin Raceway
Grattan Raceway
BlackHawk Farms

Tire Rack
Hoosier Tire
Terry's Jaguar Parts
Pegasus
SafeRacer.com
Racer Parts Wholesale
Porterfield Brakes