Based on this product's specifications, here are some alternatives and similar models
Internal Corner 25×20 mm 90° LHD, Kopos model 8915, cream-white
Summary description:
Kopos internal corner piece model 8915 for cable trunking runs, sized 25×20 mm with a 90° LHD configuration in cream-white. Designed to join and route rectangular cable ducts neatly around internal corners, it ensures continuous protection and tidy installation of electrical and data cables in residential and commercial settings.