Based on this product's specifications, here are some alternatives and similar models
Fan kit Rittal SK 3243.710 — built-in AC fan, airflow 540 m³/h, plastic housing, grey
Summary description:
Rittal SK 3243.710 fan kit is a built-in AC cooling fan designed for enclosure ventilation. It provides an airflow of 540 m³/h, features a plastic grey housing and is supplied as one unit per pack. Suitable for maintaining airflow and temperature control in electrical cabinets, control panels and industrial enclosures.