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Had this aluminum plate laser cut a few months back and hand-wired it with Box Navies and a RPi Pico, and oiled oak for the sides. I missed my numpad, though, so I used my own laser cutter and made an external one from Masonite and textured spraypaint.
@Reverendender
I am in the US, so Xometry was pretty economical for my needs. I had three top and three bottom plates cut from 1.5mm 5052 aluminum for $67 total, tax and (free) shipping included. I added in a laser kerf on the swillkb plate generator that probably wasn't needed, as the switches are in there VERY snug. If you were doing a plate for hand-wiring, that's not a bad thing, actually. If you need one to mate with a PCB, I'd consider leaving it off, but it could have been the specific shop or really anything. There is a bit of luck involved in this process, which is basically a crude form of prototyping.