Based on this product's specifications, here are some alternatives and similar models
Rack blanking panel 19" 2U perforated CAYMON BSG02H
Summary description:
Perforated 2U 19" rack blanking panel by CAYMON (model BSG02H). Designed to fill unused 2U spaces in server and network racks, it improves airflow management and prevents dust entry while maintaining ventilation due to perforations. Suitable for standard 19-inch cabinets in data centers, server rooms and network installations.