I believe that if you do a search you can find the Tillotson and Bing carb kits at: www.bantasaw.com , check out the 2 cycle carb kit section and type Bing in the search box to locate the kits. I believe that Crofter ordered a bunch of carb kits from them at a reasonable price. They even have Kits for the older Tillotson carbs. Lewis.