66 Barracuda Weatherstripping

Soft seal, metro seal, even Layson’s.

Sadly no one place is a one stop shop for the early a weatherstrip. eBay is a good source but verify who made it. There are people there who “make their own” seals and sell them as actual. I got one set of gaskets for the 1:4 windows that were another gasket cut down with a razor to make them fit.
Good luck-
Joe