Replacement keycaps for the Commodore C64 and 64C. Available in multiple colors when they're in stock (because they're popular). Includes the regular keys, the big keys (CTRL, RESTORE, left and right SHIFT, RETURN, and the spacebar), and the function keys on the right-hand side.
Yeggi search engine results for 3d printable Pusheen stuff. I was specifically searching for keycaps.
A company that sells keyboards, keycaps, keyswitches, cables, and all the other nifty-keen-like-wow stuff that people use to trick out their hardware.