Based on this product's specifications, here are some alternatives and similar models
Rack side panel SCHROFF Pentair X sidewall Type F 3U 295 mm
Summary description:
SCHROFF Pentair X sidewall Type F is a rack accessory designed for 19" enclosures, with a height of 3U and a depth/length of 295 mm. The side panel provides structural support and protection for equipment mounted in the rack, helps organize internal components and cabling, and is intended for use in server rooms, network cabinets and industrial enclosures.