Based on this product's specifications, here are some alternatives and similar models
Brass Reducing Tee TECE 32 x 20 x 32 mm (760519) for Plumbing Connections
Summary description:
Brass reducing tee TECE 32 x 20 x 32 mm (model 760519) is a plumbing fitting designed to join three pipes with a reduced central branch. Made of brass, it provides corrosion resistance and mechanical strength for water distribution systems. Suitable for use in heating and potable water installations where a 32 mm to 20 mm reduction is required.