Based on this product's specifications, here are some alternatives and similar models
Rack blanking panel 19" 1U ventilated CAYMON BSV01
Summary description:
Ventilated 1U blanking panel for 19-inch server racks from CAYMON, model BSV01. Designed to fill unused rack units while allowing airflow through its vented surface to improve ventilation and cooling. Suitable for data centers, server rooms and network cabinets to maintain organized racks, prevent dust ingress and optimize airflow management.