Saving Old Seagulls

I am looking to buy a Bing carburetor air intake compensator (the cover to the air horn of the Bing carb) for a mid-seventies Forty-Plus. It is listed as Seagull Part No: 76/558 which is #7 in this exploded view of the carburetor:

http://www.saving-old-seagulls.co.uk/faq/bing_carb.htm

Please contact me via PM if you have one to sell or know where I might secure one. Thank you.

Have you tried John, this boards sponsor? His details are on the main site.

Or Charles L.
He's getting rid of lots of "new old stock". I bought one for my EGF last year along with some other Bing carb parts.
Worth a try

Jon

Thanks for the tips! Your assistance is greatly appreciated.