Based on this product's specifications, here are some alternatives and similar models
Mounting plate Rittal VX 8617.000, steel, grey, for VX system, width 300 mm
Summary description:
Rittal VX 8617.000 is a steel mounting plate for VX system chassis, finished in grey and 300 mm wide. Designed to be fitted inside VX enclosures, it provides a rigid support surface for electrical components and assemblies. Suitable for industrial control cabinets, switchgear and panel installations; sold in packs of 4.