Compatibility of Arturia Keylab rubber contacts between 13-key and 12-key formats

“Is the contact rubber for the 13-key Arturia Keylab available in a 12-key format, and is it compatible with the Keylab Essential 61 model? If not, is it possible to adapt the 13-key rubber to fit a 12-key format?”

Both seem to be available. They are not the same although it looks like the difference is an added pair of contacts. If the existing contacts are not missing or broken they can be cleaned with a pencil eraser and a swab and rubbing alcohol.