This is the casing for the Macro Keypad I designed. You'll need 4 m2.5x10mm screws. I might improve the USB-C connector in the future. 

I used the following Keycaps: https://www.printables.com/model/397 

If you want additional Information and/or the files for the PCB, visit: https://www.instructables.com/Macro-Keypad/