Based on this product's specifications, here are some alternatives and similar models
Angle Gear for Brushcutter PRO YTOP19GW — replacement gearbox for petrol grass trimmers
Summary description:
Replacement angle gearbox (przekładnia kątowa) compatible with PRO brushcutter model YTOP19GW. Designed for petrol grass trimmers, this gearbox transfers torque from the drive shaft to the cutting head. Suitable for repair and maintenance of brushcutters, it provides the mechanical interface between motor and cutting attachment for effective vegetation trimming.