I have used rubber floormat from Home Depot as plain control panel overlay on more than one cabinet.
The stuff is on big rolls in the area with the carpets. Look for the cheapest, plainest black stuff.
You install it upside down. Stretch it over your panel, and then knock it in with small nails on the underside. Then cut your holes for your buttons and joysticks and you are good to go.
The stuff is indestructable, and looks just fine on any cab. Heck, you could probably coat an entire cabinet in the stuff if you wanted to.
It is also really cheap. Something like $1 per foot, and the rolls it comes on are like 2 or 3 feet wide. So it only takes like one or two feet for most any panel.