Based on this product's specifications, here are some alternatives and similar models
TTPLAST electrical installation duct KK 20 x 11 mm, 2 m (model 10259)
Summary description:
TTPLAST KK electrical installation duct 20 x 11 mm, 2 m (model 10259) is a rigid cable trunking designed to route and protect electrical wiring in residential and light commercial installations. With a rectangular cross-section measuring 20 by 11 mm and a two-metre length, it is suitable for concealing small cables, organizing wire runs, and providing mechanical protection and basic insulation along walls, ceilings or inside enclosures.