I have a customer asking for instrument panels. They need to be black, engraved with white letters, then be able to be backlit for night time operation. So do they make a clear substrate with a white layer below a black layer? I have found all the two layer material, black on top, white once engraved, just not sure where/what to look for as an all in one material. Oh... it's supposed to be finished thickness of approximately 3/16".