Based on this product's specifications, here are some alternatives and similar models
Extruder assembly for Flashforge Creator3 compatible (MPN 20000908001)
Summary description:
Compatible extruder assembly designed for Flashforge Creator3 models, replacement part MPN 20000908001. Intended for restoring or upgrading the printer's filament feed and extrusion functions. Suitable for use as a spare or repair component to maintain print quality and reduce downtime. Easy to install by replacing the existing extruder unit according to manufacturer instructions.