Based on this product's specifications, here are some alternatives and similar models
Rittal rack accessory 4175.000 mounting rail for TS/SE 8, steel, silver, 23 x 23 mm, length 1495 mm (pack of 6)
Summary description:
Rittal 4175.000 is a steel mounting rail designed for use with TS 8 and SE 8 enclosures. Finished in silver, the rail measures 23 x 23 mm in cross-section with a length of 1495 mm. Supplied as a pack of six, it provides robust support for mounting equipment and fittings inside server and control racks, cabinets, and industrial enclosures.