CD-1 is N,N-Diethyl-p-phenylenediamine sulfate, CAS: 6283-63-2. its still available.Calbe A-49 uses as developing agents:
N-N-diethyl-1,4-phenylendiammoniumsulfate = Kodak CD1 and
CD-1 can be substituted (and I really substitute it) with N,N-Diethyl-p-phenylenediamine Hydrochloride, CAS: 2198-58-5 (also available).
CD-1 also can changed to CD-2 - N, N-bis (2-hydroxyethyl)-p-phenylene diamine Sulfate (CAS: 4327-84-8), but CD-2 need in 1.5-1.8 times more
you can try to use CD-3 or CD-4. can't test it because not available in my country