I believe Elans, until the S4 Sprint, as well as the Lotus Cortina came with Webers so they might be a source as well as European Europas. There is a company in Washington state (I can't remember their name at the moment. I'm sure somebody will remind me.) converts Stromberg heads to a Weber head so that is an additional route to a Weber head. It ain't cheap but neither is a real Weber head.