Old film processing
I had an issue like yours, look for a guy on here talking about CN17 Agfa processing in C-41, he discovered that he could process older emulsions like CN17 and C-22 in C-41 by NOT heating the developer and keeping it at room temperature and then developing for a longer timeframe (but I can't recall the procedure off hand). The images he got were beautiful. It's the HEAT that destroys older emulsions that weren't designed for such temperatures.
Good luck and please post results.
If you have money $ there are labs that specialize in this but you'll pay upwards of $40 per roll! Haha
Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1, 5DmkII / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic | Sent w/ iPhone using Tapatalk