big window tinting woes

[57 3100]

guys,
i went to 3 different window tint shops today to get my windows tinted, so when i do get my a/c unit, it will help keep the inside cooler.

all three places did a test section and said the outside wrap areas of the rear window is a huge problem, even when making a vertical slice near the corners.

have any of you found a place that was able to tint your big back window ?

i know they sell tinted glass now, but dont want to spent that kind of money...

thanks

leonard