Based on this product's specifications, here are some alternatives and similar models
Adapter Rittal 9635.200 — mounting/accessory adapter for Rittal enclosures, 1 pc
Summary description:
Rittal Adapter 9635.200 is a single-piece accessory designed for use with Rittal enclosures and mounting systems. Supplied as 1 pc, it provides a factory-specified fit and compatibility with corresponding Rittal products. Use it for secure attachment or integration of components within electrical cabinets, control panels, and industrial housings.