Based on this product's specifications, here are some alternatives and similar models
Floor drain insert Kessel 48503 Ecoguss round DN100
Summary description:
Round floor drain insert by Kessel, model 48503, made from Ecoguss material with nominal size DN100. Designed as a replaceable insert or grate for drainage systems, it fits DN100 openings and provides corrosion-resistant coverage for interior or exterior floor drains. Suitable for renovation, repair or new installations where a round DN100 insert is required.