I think states, if you google bing carbies that'll give you the rep for USA/Asia/australia. 
 I got in touch with them  
[email protected] and then they got Charlie to contact me by email:
From: Bing Carburetor [mailto:
[email protected]] 
Sent: Wednesday, February 10, 2010 7:49 AM
To: 
[email protected]Subject: FW: 1981 KTM 390cc 
Charlie,
Please reply to Barry with prices and remedy in regard to his choke. 
Fay R. Laughridge, VP
Bing Agency International
620-767-7846
gave him the details of my bike and carbie.  I was inquiring also with him about the cable operated choke and he advised me what to check so i could disconnect that.  I am about to order a kit and new floats from him
Hope that gives you a paper trail!!