Based on this product's specifications, here are some alternatives and similar models
Heating sink accessory Flashforge AD5X HEATING SINK
Summary description:
Flashforge AD5X HEATING SINK is a heating sink accessory designed for compatible Flashforge 3D printers and extruder assemblies. It serves as a thermal management component to dissipate heat from the hotend or heating block, helping to stabilize nozzle temperature and improve print consistency. Suitable for replacement or upgrade in maintenance and repair tasks.