Based on this product's specifications, here are some alternatives and similar models
Relpol GOP11 Relay Socket for R15 3P Relays, Solder Terminals
Summary description:
The Relpol GOP11 is a high-quality relay socket designed for R15 3P series industrial relays. Featuring solder terminals, this socket ensures a secure and reliable electrical connection for panel or chassis mounting. It is an essential component for industrial automation, control systems, and electrical engineering applications requiring stable relay integration.