I recently obtained a Kaypro II keyboard - I just really like the look of these old boards.
I have a Kaypro 4 board with SMK J-M0404 switches - I was hoping this one might have Key Tronic foam and foil and it did.
The foam and foil were in even worse shape than usual - much of the foam had literally turned to dust:
The board came with a bonus spider egg sac:
I'm getting faster at replacing the foam and foil so it's not too bad to do now, then traced out the matrix and wired up the xwhatsit:
Retrobrighted the blue keys then reassembled the case and it's up and running.
I'm learning to do with out Alt, F keys, nav clusters and all that newfangled stuff!