Although not as exotic as FX-2, Crawley's FX-37 (formula published) and Paterson's packaged FX-39 (probably unpublished but doesn't sound too different from FX-37), dilute DK-50 supposedly produce similar results.(posted 8175 days ago)Gainer's Vitamin C developer is also high accutance, and if smoother result is desired, my accutance developer (Metol-vitamin C with carbonate buffer) is easy to mix. Metol and vitamin C keep well, unlike glycin. If you intend to continue B&W photography for years, I think it's a wise investment. (you can also make a good print developer out of these.)