Not that I've ever seen, which will be nice to be the first to make something.
I need to design them from scratch. I already have a new manufacture who can make these (hopefully) to good standards, being so small I am unsure the quality of the finish. I'm using the same company who are making the door sills.
I will have a crack at this over the weekend. The concept, will be to sand the current buttons to a clear finish, and mount stainless buttons to each one, leaving the laser cut design to allow the LED light to come through, giving a perfect stainless steel button. I may have to modify the buttons to allow the steel to sit as low as possible, it all depends on the thickness of material I can get supplied.
Of course each button would require to be smoothed and sprayed on the sides to reduce that stuck-on look. The best looking modifications are the ones which look like they are meant to be there IMO.
Either way, watch this space