Based on this product's specifications, here are some alternatives and similar models
Mounting bracket Rittal KL 1594.000 — stainless steel housing, pack of 4
Summary description:
Rittal KL 1594.000 is a stainless steel mounting bracket intended for secure wall or enclosure attachment. Supplied as a pack of 4, each bracket is made of stainless steel (material noted) and designed for durable, corrosion-resistant mounting of housings or panels. Suitable for electrical cabinets, industrial enclosures and indoor/outdoor installations requiring stainless steel fittings.