We're not going to resurrect T55 film. There is still a little bit out there so if you want to try it you might still have a chance. Otherwise it is gone the way of Kodachrome.
PE, thanks for the tip. Have you seen Quall's HC-110 monobath, and the results? I have not found anything in Haist that is as convenient. The real question is can we make an active DTR receiver easily or not? There are so many formulations mentioned in patents and Old Pol and Fuji's are completely different. I'd like to formulate a fast acting lead acetate bath that I can simply spray glossy inkjet paper with, then topcoat with release agent (soap). If it is easy, we'll try for a P/N, and if not, a field processable negative only in 4x5.