Based on this product's specifications, here are some alternatives and similar models
Hotend cooling fan for BambuLab A1 series 40 mm, replacement part BML-26349
Summary description:
Replacement hotend cooling fan compatible with BambuLab A1 series 3D printers. This 40 mm axial fan (manufacturer part BML-26349) provides directed airflow to cool the hotend assembly during printing, helping maintain stable extrusion and print quality. Suitable for maintenance, repairs, or upgrades of BambuLab A1 machines where hotend cooling performance is required.