Looking for Motor Controller

I am looking for a 3 to 5 amp (min) motor controller that can be controlled via an RC receiver.
They have them here:
http://www.robotcombat.com/store_machinelab_mmp5.html
Close up of it:
http://www.robotcombat.com/images/store_10Apwm_lg.jpg
But $75 bucks for something like that just seems to be about double what they should cost for whats on the PCB.
Does anyone know where I can get a reasonably priced PWM controlled motor controller?
Thanks! Michelle
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try http://www.pololu.com they have some motor controller and reasonably priced. Good luck
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