Help with some Door Windows !

[69CVET]

Morning Guys and Gals

I am in the midst of changing over some Door Windows on the C3 1973 Chop Top Vette
Windows that I have removed are scratched due to 1) being a form of polycarbonate 2 ) Some guides had come a miss causing the misalighnment

I have templates but hoping to borrow a piece of glass ( maybe someone has a old spare ) I only need it to get the radius of the bend
and I can return it ...

Let me know if you can assist ... cheers Chris