I have one prototype plate coater and two prototype film coaters. I don't have current plans for selling them. That may change, but the cost is too high for a one off item.
As for coating PVA, BTDT as well as PVP and PVAA and co-polymers of these with other monomers. It was rather common at EK to do this in research. That is why I started a thread on testing new vehicles.