High current variable voltage from an atx psu Answered

What would be the most simplistic way to draw up to 10a on an atx PSU using variable voltage controlled by a potentiometer? I've looked at a few diagrams using the LM317 but it is limited to 1.5a. The only other VVR I can find is the LM350 but is still limited to 3a. Any ideas?
I was thinking of stacking an arrey of LM350s in parallel but this doesn't seem like a viable answer.