I cut some 3mm plastic to the proper size with the proper holes. I intend to make a top plate as well, but I though I'd show what I have so far.
Screws are nylon 4-40 thread 0.5 inch long, pan head. They make good little feet. They press fit in to the board holes.
CNC Cut Bottom Plate
Re: CNC Cut Bottom Plate
Pretty cool - more please 
