Based on this product's specifications, here are some alternatives and similar models
Rivet gun mouthpiece GESIPA AccuBird/PowerBird/Taurus Standard 17/29
Summary description:
Replacement mouthpiece (nozzle) for GESIPA pneumatic rivet guns AccuBird, PowerBird and Taurus. Standard 17/29 size as indicated in the product name. Designed to fit compatible GESIPA models, it ensures proper seating and guidance of rivets during installation. Suitable for maintenance and spare-part replacement to restore correct tool operation.