Based on this product's specifications, here are some alternatives and similar models
Mounting Bracket Rittal CP 6664.500, stainless steel (steel material)
Summary description:
Rittal CP 6664.500 is a stainless steel mounting bracket made of steel for use with CP 40 support-arm systems. Designed to secure and support electrical enclosures, components or attachments in industrial installations. Corrosion-resistant stainless finish and robust steel construction provide durability for indoor and outdoor technical applications.