There used to be a place in Michigan but they have no longer got parts for the older Zenith's. As an alternate choice I have had good luck with "Carb Junky's" in Atlanta. They have a large selection of Zenith carbs and parts. They can also refer you to sources for replacement venturis. I'm far from an expert on the subject (full disclosure) but have been working with my dual setup for a few months trying to get it adjusted in. Learning as I go. Beater if you want info I have in print I can send it along via email. My email: larry@ingraphicdetail.com.