Based on this product's specifications, here are some alternatives and similar models
Blank Panel SCHROFF 4U 3 mm RAL7021 — front panel for 19" rack enclosures
Summary description:
Blank panel SCHROFF 4U, thickness 3 mm, finished in RAL7021. Designed as a front blanking panel for 19-inch rack enclosures to close unused rack space, improve airflow management and protect internal components from dust. Suitable for server cabinets, network racks and industrial enclosures where unused units need to be sealed and neat cable management maintained.