I recently obtained one of Bart's Laser Interface/Driver PCB's to control my laser, but I've decided to go bigger and also think about adding a 4th axis. As such I have a complete and ready to wire Laser Interface/Driver PCB available for potential sale. It was originally assembled and tested by Bart and has not been used significantly. I hooked it up briefly to test some motor movement and that worked very nicely.
I also have a bare PCB version that I may be willing to part with if someone is interested in building it DIY.
You can read more about it here:
http://www.buildlog.net/blog/2011/04/laser-interfacedriver-pcb/If you are interested please PM me and we can talk.