The Speedibrews Celer-41 kit claims it can do C22. They basically sugguest deving for about 12 mins at room temperature. I'd suspect that most room temperature compatable C-41 would probably work OK.

I tried it on a roll I aquired and the results were pretty poor, but then it was a 30 year old film - there was something on their, and I could probably have printed something if it had been interesting. The kit cost about 10 pounds, and I used it on a whole bunch of old and out of date films, so it was worth trying.

I wouldn't expect much from it, and wouldn't pay to have it done commercially unless you've reason to believe theres something really special on there.

Ian