I have one of these which is new for sale - fitted with Corally's, set up & tested but never used...
http://www.mtroniks.net/details1.asp...er-tempo11.htm
Small & light, works with 4-7 cells & down to 11 turn brushed motors.
Ideal for 1/12th & Stock cars - that's what I got it for anyway...
£17 posted (inc. any paypal fees).