I have a 1967 and 19971 Nishijin that I restored to working order that are missing keys. Does anyone have advice on getting replacement keys made or bypassing the locks? The machines will be mounted on the wall in a cabinet and I want to have the locking mechanism function to hold them securely closed so the kids don't get hurt or mess them up.

I read some old treads but most have broken links / missing photos.

Thanks!
Taylor