ThrustMaster makes an MFD overlay with 20 buttons and two switches that are backlit. Their marketing is kind of deceiving as they do NOT include the LCD monitor but only some cardboard templates that LOOK like displays.
Found the CAD dimensions online… 5.5″ square. A monitor would have to be 4.25″ at it’s smallest dimension to work behind it… 5.5″ would be ideal because you could adhese the overlay directly to the LCD screen.
On another note, here are some ideas to tantalize you with the wrap. Obviously very preliminary but I like the background image a lot. I am currently working with Genius (Taiwan camera company) to see if they want to buy the whole thing.