Based on this product's specifications, here are some alternatives and similar models
Rack accessory Rittal 2481.000 steel metallic adapter for connector cutouts, pack of 5
Summary description:
Rittal 2481.000 is a steel rack accessory finished in metallic colour, supplied as a pack of 5. Designed as an adapter for connector cutouts, it provides structural support and neat mounting for cable and connector openings in server and network enclosures. Suitable for use in IT racks, cabinets and industrial enclosures.