you tried these guys:
https://flex3drive.com/printbite/
Don't know of any suppliers in the states.
Although looking at their list of materials they claim will work on printbite, there are some there that absolutely do not work.
polycarbonate - nope, not a chance, nada, nix does not stick at all. Ninjaflex -well yes it sticks, but try getting it off. Not recommended. Pva is the best print surface for tpu's.
Nylon, yes - kind of. But under no circumstances shold you attempt to print Mymat nylon on printbite. Just don't :-) Use pva and it's perfect.