66 Barracuda front windshield gasket question

Yup, three different ones that year. If yours is still in good shape, I'd save it and reuse. The only reproduction I'm aware of is the non-vinyl roof, non-convertible version. It will fit the convertible with minor mods, but, not sure about the fitment with a vinyl roof.
It is in fairly good shape; the can has been garage kept since 1985. I was going to remove the windshield for upcoming paint, body work and a new headliner but I may re-think that plan