Based on this product's specifications, here are some alternatives and similar models
Ventilation grille AWENTA T36 white with insect mesh Ø100–150 mm
Summary description:
AWENTA T36 is a white ventilation grille designed for air supply and exhaust duct openings with an adjustable mounting diameter of 100–150 mm. It features an integrated insect mesh to prevent entry of insects and debris, a flat front profile for discreet installation and is suitable for residential and light commercial ventilation systems.