1972 Dodge Charger Problems with rear window alignment

Interior problem
1972 Dodge Charger V8

I am working on a '72 Charger and am having major issues getting the windows aligned. Both rear quarters were replaced in the vehicle prior to my getting it to fix the windows. I've tried every possible adjustment to get the windows in the right position. No matter what, they are tight up against the inner wall of the channel. When I got the car, they were so crooked they wouldn't even go into the channel. The windows are flat up against the outer fender gaskets and still are flat up against the inner walls.

I am thinking of making plastic

spacers to put between the window mount and the window, to change the angle of the window. But the angle change of the back windows may interfere with the front windows. This is the only solution I can think of without pushing the rear quarter panels an inch out on each side! LOL The body shop doesn't want to know a thing.

Any ideas on other possible solutions?

Thanks!!

JQ