Based on this product's specifications, here are some alternatives and similar models
1U fan block ProBase SR3.1.2 19 inch for switching cabinet, model FAN-1U2-S
Summary description:
1U fan block ProBase SR3.1.2 for 19-inch switching cabinets (model FAN-1U2-S). Designed to fit a standard 19" rack, this 1U module provides forced ventilation to improve airflow and cooling of network and server equipment. Suitable for datacenters, server rooms and telecom racks where compact, rack-mounted ventilation is required to reduce component temperature and maintain reliable operation.