I don't know anyone doing that today, but some 15-20 years ago Michael Smith had some Azo type ( silver chloride) paper made by a fairly well known emulsion maker, and sold it as Lodima (= emordnilap of amidol). I suspect that Michael consulted with Ron Mowrey re: silver chloride papers.
It is not terribly difficult to make your own silver gelatin emulsion. You can a lot of information on the subject at
www.thelightfarm.com of Denise Ross. Denise also published a book on the subject in the Focal Press series of Routledge, The Handmade Silver Gelatin Emulsion Print.
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