Tag Heuer WAC1113.BA0850 Formula 1 bezel Rachet/Friction Spring?

G'day does anybody know the correct part number or provide a link where I can actually purchase a Bezel ratchet spring for Tag Heuer WAC1113.BA0850 Formula 1? I don't know the correct size given i purchased it on eBay and the ratchet spring was completely missing?

I need part number, correct size or direct link to where I can actually purchase the correct bezel ratchet spring for Tag Heuer WAC1113.BA0850? The Tag Heuer Sales person informed me that they call it a "Friction Spring" can anybody help as this would be very appreciated? Cheers Dave

Hi- try here- http://watchpart.co.uk/heuer-m-40.html?filter_id=543&sort=3a

Mixed reports on this website- some have found them slow/ unresponsive, while others have had no problems. They do have good access to parts