All of the repro companies have them. 67 uses a taller style so be sure of which one you want. If memory serve's they are right around a 100 bucks, and way superoir to the originals. I have an orig. on one car and its always fogging up and stuff. My new ones never do.
4 Firebirds, mines a 69 Firebird 400 R/A III (soon). Volvo Racer in the works, and just a little bit of everything.