Got the panel overlay laser cut and engraved by Martian Laser in San Diego. It's made from a 1/8" reverse laser mark sheet of plastic made by Rowmark. I used split electrode electroluminescent sheet from LuminousFilm to produce the backlighting. I drafted everything up in autocad before getting all the pieces cut.
Gutted a cheap PWM dimmer I found on Amazon to provide dimming for the electroluminescent film. This is what the vendor said to do to provide remote dimming with a rheostat.