Based on this product's specifications, here are some alternatives and similar models
Internal sewage reducer MAGNAPLAST HTR short 110/75 mm (model 11345)
Summary description:
Short HTR internal sewer reducer by MAGNAPLAST, model 11345, with pipe diameters 110 mm to 75 mm. Designed for connection of differing PVC sewer pipes in internal drainage systems, it provides a compact transition between standard 110 mm soil pipes and 75 mm branches. Suitable for residential and commercial plumbing installations where space is limited.