Based on this product's specifications, here are some alternatives and similar models
TRYTON drive sprocket left for petrol lawn mower models TOO5150A TOO5160A, part YYZNKL01
Summary description:
Left drive sprocket (drive pinion) by TRYTON, compatible with petrol lawn mower models TOO5150A and TOO5160A, part number YYZNKL01 (EAN 5903755061454). Designed to transmit rotational motion within the mower drive system, it fits the specified models for repair or replacement of a worn or damaged sprocket. Suitable for DIY maintenance and professional servicing of compatible garden mowers.