They can be home made. I do not have complete formulas for either process, just bits of them.

The C-22 developer is close to C41 but uses CD3 and contains Benzyl Alcohol. IIRC, the Agfa process uses CD2. They both use Ferricyanide bleach baths. That's about it OTOMH. It would take me hours to find the actual formulas. If you wish, you might look in older patents for C22 such as Edens and Mowrey on developer stabilzers. IIRC, the entire C22 developer formula is given there.

PE