Based on this product's specifications, here are some alternatives and similar models
Air duct system Rittal SK 3286.870 (model SK3383/84/85) for enclosure ventilation
Summary description:
Rittal air duct system SK 3286.870 (compatible with SK3383/84/85 models) is designed for directing airflow within electrical enclosures and control cabinets. It provides organized ventilation paths to improve heat dissipation and protect components from overheating. Suitable for industrial and commercial cabinets where controlled internal airflow and efficient cooling are required.