You might try these guys.
https://www.autocityclassic.com/1969...evrolet-glass/
Of course if the glass shop installs the window and it breaks you purchase another one.
If it's their product they typically cover it.
I used AutoCityClassic.
Available Colors: Clear, Green Tint with Shade Band and Custom Grey Tint with Shade Band
Price:$119.00
I purchased the Custom Grey Tint and love it. Service was excellent and shipping reasonable.
Cheers.