Sell My Retro), which is a PCB with miniature tactile switches for keys and an overlay printed to match the ZX80. This made a very nice looking computer when paired with the Minstrel ZX80 clone board.
All ready to go into whatever case the buyer has in mind.
As I always say when asked, pretty much anything with a keyboard can be converted into a USB keyboard. If you have something in mind, let me know.