I have the 55 reagent or something very close to that reasonably well analyzed. The Haist book is also an excellent monobath treatise which does touch upon the reagent without being specific. There is no specific 55 related patent that I know of after a fairly intense review. At least one suitable off-the-shelf emulsion has been identified that could be used with the reagent - but - we do not have a handle on the DTR kinetics yet, which are determined by, among other things, the receiver sheet.
That's the part where I could use some help.
Much more on http://new55project.blogspot.com