Many thanks!Number 4 on this diagram..
coupling Audi A2 (A2) 2003 year Audi EUROPA 141040
coupling Audi A2 (A2) 2003 year Audi EUROPA 141040 spare partsaudi.7zap.com
You may find this part is also included if you buy a new operating lever ( arm ).
Sure someone recently was changing a clutch and the top hat was included with the arm.