If you look carefully on teh Kodak Motion picture film site, there are the formulas for Plus-X _REVERSAL_ and Tri-X _REVERSAL_ which were and are respectively only sold in 16mm. Those formulas are what Movie labs use successfully to reverse ORWO UN54.

http://motion.kodak.com/motion/uploa...2415_h2415.pdf

The Kodak Movie formulas Don't work reliably with Foma R-100. The Kodak process is more environmentally friendly, and so less effective at bleaching.