There are a few of us around who still make them. I do film photography and have my own darkroom already for that purpose. Adding holography on top of that is a relatively minor lift, and every once in a while the urge strikes and I'll get the equipment out.
The main challenge is that there are, to my knowledge, only two remaining manufacturers of the plates - in France, and in Russia.
The main challenge is that there are, to my knowledge, only two remaining manufacturers of the plates - in France, and in Russia.