Based on this product's specifications, here are some alternatives and similar models
Rittal CP 6146.100 floor/base plate for CP 40 – steel, grey, load capacity 15 kg, 400×400 mm footprint, 10 mm thickness
Summary description:
Rittal CP 6146.100 is a steel floor/base plate designed for CP 40 enclosures. Finished in grey, it provides a 400×400 mm footprint with 10 mm thickness and supports up to 15 kg. Supplied as a single unit, it serves as a stable mounting and support element for wall or floor-mounted modular enclosure installations and retrofit applications.