Those windshields are not Miller-Meteor. They were the windshields made for and installed by Cadillac on all 1977-1984 commercial chassis. Miller-Meteor, Superior and S&S all used the same commercial windshields at the time. As such, this was a readily available component that can (or colud be replaced) in the aftermarket through a glass supplier. Now, when Cadillac ceased production of the commercial chassis with the special cowl that included the "commercial windshield" the windshields on the FWD Superior, S&S and Eureka vehicles were all custom made for each manufacturer to their specifications - as was the side door and loading door glass. While S&S and Superior commercial glass for these FWD cars may be the same, that used by Eureka was proprietary and used only by, for and on Eureka products.