Keyboard case modeled to be compatible with the Keychron K10 pro wireless
https://cad.onshape.com/documents/5fc32454a189528911ecf189/w/cad0c257882af02f0be269fa/e/e3cf7c916934e5fdda0deab8
Machined from acrylic total cost was 800 USD for all the parts including machine work.
Caveat: When assembling this I cracked multiple standoffs and the brass inserts in the base don't fit super well. The keyboard went together perfectly fine but I'd be concerned if I had to assemble/disassemble it more than a few times.
The author marked this model as their own original creation.