The latter product was called Ektaflex "C" and Ektaflex "R" paper, and was terminated by the Polaroid lawsuit.
So that is why those little 'PMT' like machines disappeared so quickly.
I was given a box of receiver paper for Ektaflex earlier this year. I tried using it in a great qualtiy Olympus dye sub printer I was also given, and it did not work. Oly proprietary paper is now rare as hell, so both the Ektaflex paper and the printer went to the recycling depot in the same trip.