The etching is done with a laser cutter set to etch instead of cut Chintan. Whilst some laser cutters take illustrator files (vectors) as well, others only take CAD files - often crappy chinese ones - so you should check with whoever does laser cutting in your area to ask about it. Usually they will etch it out for you, but a better idea for it would be to test etch it on a piece of balsa wood first, as it is very soft, and thus easier to test with, to get an idea of how the final piece will etch and look. You can get it from any arts and craft, or model making/art supplies, large stationary store.
And for other folks willing to happily brave it, if you know a little CAD or Illustrator, you can do custom case etchings in house just like IndyLux - that was a brilliant idea btw bruh - or you can lift the gazillion designs off of the internet for vectors or CAD patterns. A good place to start for this, especially for patterns like Indy's, would be to look into fractal or Islamic geometries, fascinating world that - and its all natural mathematical proportions and self proportioning systems... but now I'm just getting carried away. So I'll shut up for now.
But, dang, was that a brilliant or was it a brilliant idea Indy. Hats off to you brother, for cooking that possible design scenario up.
-- W