Hello Alan. You may want to try Jeff Lain at KaddieShack VW in Pasadena, Ca. He has great assortment of Kadrons, and is able to mix and match as the need/fit requires. I am looking right now at tossing the single carb I have on mine and moving to a pair of 40mm Kadrons. Jeff also has great old style air cleaners for these carbs that help them look period correct. Check his website. Grant