I called Keytronics, and they said they have not made these since 1992 or
1993. They gave the name and phone of Mil-Key in WA, 509-891-6425. They
said they MIGHT still have some available there.
They also said Cherry capacitive keyboards use the same technology, and are
still in production.
Last tidbit of info, she said these foil and foam pads are also known as
"deccofelt pads".
Cindy Croxton