Based on this product's specifications, here are some alternatives and similar models
Replacement fan Renkforce Pro 7 Dual RF-5491878 for 3D printer
Summary description:
Replacement fan compatible with the Renkforce Pro 7 Dual RF-5491878 3D printer. Designed as a direct spare part to restore cooling of the hotend or print chamber, it ensures stable printing conditions and prevents overheating. Suitable for users needing an original-equivalent replacement to maintain print quality and reliable operation.