Based on this product's specifications, here are some alternatives and similar models
Berker 454002 Single Support Plate with White Mechanism Fastening Element
Summary description:
The Berker 454002 is a high-quality single support plate designed for R.1/R.3 series mechanisms. Constructed from durable metal, this component includes a white fastening element for secure installation. It serves as a reliable mounting base for electrical switches and sockets, ensuring stability and precise alignment within the wall box. This pack contains 10 units, making it suitable for professional electrical installations and renovation projects.