Based on this product's specifications, here are some alternatives and similar models
Extruder (hardened steel) for BambuLab X1 series — compatible extruder part
Summary description:
Hardened steel extruder designed for BambuLab X1 series 3D printers. This replacement extruder part is made of heat- and wear-resistant hardened steel to improve filament feeding durability and reliability. Intended for use in extrusion systems of BambuLab X1 models to ensure stable filament transport and reduce wear in high-use or abrasive filament printing scenarios.