Oooorrrrrrr...... If by chance you're open to building your Chevy in junkyard or ghetto style, you could just use the broken one and add some more cracks, perhaps a bullet hole.
i did this to my Fw190 canopy after failed attempts to remove paint overspray. I saved a broken Jeep windshield in a similar manner. Granted, these are military combat vehicles, much more likely to be sporting bullet holes than your Bel Air. Just thought I'd share the option with you.
Bill.
On the bench: Lindberg 1/32 scale 1934 Ford Coupe and a few rescue projects.
In queue: Tamiya 1/35 Quad Tractor or a scratch build project.