PWM speed controllers cheaper than Victors?

[ProjectZero]

Hi guys,

This summer I'm working on an independent project to build a hexapod robot. I've all ready built the frame, attached the motors, etc. I was using 6 Victor 884s, powered by a 12V battery and controlled by an Arduino Uno. Problem is that when I leave school for the summer I'll have to give back the Victors, and they're waay to expensive for me to buy on my own. Does anyone know of any cheaper pwm motor controllers that work similarly? Thanks alot!