Working on an old Sefram 7835 with an adhesive foil switch pad 17 x14 cm and am not likely to get one from the company, thought about creating a "mechanical" version with a pcb and low profile tact switches.
I am undecided though how to unstick it without much damage, the top layer I would reuse with the symbols on it while need to follow the track print it has to create a new layout.
Poor thing has had a very bad life crunched and broken open with a vice so bent and twisted, fixed the lower case so needing to flatten the top (switches on it are duff anyway). Cured other faults and it seems to work fairly well now.
So any good ideas about this unstick issue please
David