I've been using the 400 speed Fortepan sold under the "Classic Pan" label. It is theoretically supposed to be like Tri-X, being produced in an old Kodak plant. I've been processing it in PMK, and I haven't gotten it to look like Tri-X looks in PMK (not enough contrast), so I'm going to try it next in ABC pyro. It's also on a thinner base than Kodak sheet films. It does not seem to have the density range I would expect from a thick emulsion film of the Super-XX variety, though I think it is in fact a single emulsion, traditional film and not a T-grain film.