I am assuming that welch plugs are not unique to each carb manufacturer, so if you can't find one that fits, look for other carbs in that size range and see what is offered. Most of the time a welch plug comes with a carb rebuild kit and therefore not listed as a separate part. So maybe you can find one with a rebuild kit. As I stated above, I made one for a carb when I needed one "NOW" to get an engine running again. And a simple punch a little larger then the hole and then a ball bearing ball tapped into the center of one side gives you that domed fit. And it works perfectly...
