I have an actual MK3 CP from a dedicated machine. It has the buttons, joys, plexi and all the wires. I'd let it go cheap as well, but remember MK has a wood piece, then a metal piece and finally a plexi cover. I'd let it go rather cheap (say $60) but the shipping might be a bit crazy.
Open to anyone, I'm in TX if you would like a pic up and save on shipping. Email or PM me. (take out the dog)