I didn't do this to my playchoice, I fixed the monitors.
But I have installed LCDs into other cabinets. I was going to buy those LCD wall mounts with an arm, but I've made it work by just finding stuff to hold the LCDs in place for a lot cheaper.
-I've just put the LCD in the monitor hole and put screws around it so it stays in place.
-Used plumbers metal tape attached to the cabinet or wooden monitor surround and then screwed to the monitor's mount holes.
I was decasing the monitors, but found it easier to just leave them together and remove any kind of base/ stand. For any gaps in the paper monitor surround (bezel), I would use some black tag board from Walmart. Or just make a totally new surround (bezel).