I'm curious about options as well, for a different keyboard. I got a rubber dome keyboard apparently sold for video editing, as it has a number of custom printed keycaps. I got it because it looked like it used Alps style caps, but it turns out that they have an offset stem. Still works on an old Magitronic board, but the caps interfere with the row below...
Anyway, I am going to use these as a test platform to remove the original pad-printed/dye-sub (?) legends, see if I can make them plain colored caps. I'll let you know how it goes!
Donor board

Keycaps with off-center stems

Keycaps compared with DS Alps keycaps
