Based on this product's specifications, here are some alternatives and similar models
Mounting plate Rittal 8617.570
Summary description:
The Rittal 8617.570 mounting plate is made of galvanized steel with a thickness of 2.5 mm. It measures 700 mm in width and 400 mm in depth, providing a sturdy support for various rack accessories. Weighing 7.44 kg, this single-pack product is designed for durability and reliability in mounting applications.