Based on this product's specifications, here are some alternatives and similar models
Fan kit Rittal SK 3240.900 — built-in AC fan, airflow 175 m³/h, plastic housing, grey
Summary description:
Rittal SK 3240.900 fan kit is a built-in AC fan assembly with an airflow rating of 175 m³/h. Housed in a grey plastic enclosure, the kit is supplied as a single unit and designed for installation in control cabinets and enclosures to provide forced ventilation and heat dissipation. Suitable for industrial and electrical cabinet cooling where compact, reliable air circulation is required.