I’ve been tinkering with etching 1.75mm cork for keyboard bottoms.
I could adapt the size if anyone is interested in a custom run for a non-60% board. The 60% PCB size should be the most compatible though with 60% boards.
Also, feel free to suggest graphics. I like the cherry switch patent, so I may check out some other patent art since the sketches tend to etch well. Photos can be run through Photoshop filters to look sketched, so as long as the aspect ratio matches, the possiblities are fairly unlimited.