Based on this product's specifications, here are some alternatives and similar models
3Dsimo 3D pen replacement tip MultiPro (G3D2015) compatible accessory
Summary description:
Replacement tip for the 3Dsimo MultiPro 3D pen (model G3D2015). This accessory is designed as a spare nozzle component for precise filament extrusion and continued operation of the MultiPro pen. Useful for replacing worn or damaged tips to restore print accuracy and maintain consistent extrusion during crafting, prototyping, and repairs.