Polaroid also offers custom coating. See their web site.
None of this is cheap and you have to come to them with a coatable material. If you don't have the emulsion and they make it, if it does not work, tough. R&D is extra.
In other words, you have to do all of the R&D yourself, and you have to do pilot runs somehow to learn how to scale things up. Or, you pay to have them do it for you.
It will work and work well, but in the end it ain't cheap and it ain't quick.