Based on this product's specifications, here are some alternatives and similar models
Metal mounting plate RoGer AX-1 for PRT211xx controller and PRT12xx readers
Summary description:
RoGer AX-1 is a metal mounting plate designed for secure installation of PRT211xx series access controllers and PRT12xx series card readers. The plate provides a stable, durable surface for mounting devices, aligns mounting holes to model series, and protects cabling behind the unit. Suitable for indoor and sheltered outdoor installations where compatible RoGer devices are used.