Based on this product's specifications, here are some alternatives and similar models
Photographic film universal developer Foma GD-L 1L (liquid concentrate, 1 L)
Summary description:
Foma GD-L is a universal liquid developer supplied in a 1 L bottle for processing black-and-white photographic film. As a ready-to-dilute concentrate, it is suitable for various film types and development methods, offering control over contrast and grain through dilution and development time adjustments. Ideal for darkroom use, studio processing and film testing, it provides consistent results for hobbyists and professionals.