As Jason mentioned the JGRO is a nice little machine, probably a bit bigger than you need for PCB's only but the plans are free to download and the materials to build it are pretty cheap.
For stepper drivers have a look at the linistepper driver, I have built them and they are pretty cool, you can make your own boards or a 3 axis kit is available for next to nothing, they will drive small unipolar stepper motor's very well and if you are using threaded rod for leadscrews then they may work for you.
Good luck !
Russell. |