Based on this product's specifications, here are some alternatives and similar models
Rack cover Rittal SV 9610.000, grey PVC, pack of 2
Summary description:
Rittal SV 9610.000 rack cover made of polyvinyl chloride (PVC) in grey. Designed as a protective panel for server and network racks, supplied as a pack of 2 pieces. Provides a durable, easy-to-install housing cover to shield internal components from dust and incidental contact in data centers, server rooms and industrial cabinets.