Based on this product's specifications, here are some alternatives and similar models
Side wall for server rack Rittal 8106.245 — steel, 2000 mm H, 600 mm D, 1.5 mm
Summary description:
Rittal 8106.245 side wall for a server or network rack, made of 1.5 mm steel with grey finish. Dimensions: 2000 mm height and 600 mm depth; material thickness 1.5 mm. Designed to close off the rack side, improve enclosure protection and cable routing, and maintain mechanical strength. Suitable for data centers, telecom and industrial enclosures.