This is an old post, but in case any one else is looking, I just bought an adapter at Ace Hardware. You need to take the carb and a Zenth/Tillotson connector and they can match them up.
The original glass was 3/16"s and tempered. Laminated or safety glass is 1/4" which is common today. Pros and cons for each. I prefer the 1/4" laminated. Both fit the channels but the larger one is a more snug fit but won't rattle. if the width is a tight fit, the edges can be ground down a...
Any thoughts about the best way to orient the clamp? One part front, one part back; or one inside, one outside; or obliquely oriented; or doesn't matter at all? I've seen it all different ways, but obliquely seems more common in my experince.