ah right - seems a shame.

In that case look at the mks series of boards.

About as comprehensive as you get.
I've got a mks base 1.5
cheap as dirt and comes with onboard stepper motor controllers.
http://www.ebay.com/itm/MKS-Base-V1-...AAAOSwi8VZUdDj

Existing screen will just plug in.

That's supposed to be 3watt laser - probably wasn't focused.
what you going to do with the laser module ?