Some will appreciate this mod, some will not. I understand that it is not for everyone. But, I like building things; so here is what I came up with.
Take one of these. An Acura MDX moon roof shade 1100mm wide. Set it on the car. Tape off the half inch lip on each corner at the angle of the rear window. Now grind that 5-6 inch section off. I used a belt sander, it took about 10 minutes.
https://www.ebay.com/itm/43-TINT-SUN...lUv-j8&vxp=mtr
Unmodified
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After grinding the corners the shade fit to the top in the middle and to the newly ground edge on the corner.
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Crooked image, sorry.
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I used a LED light bar I had laying around. I have one ordered now that is twice as wide off ebay. It was only $11.99 shipped.
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3m Double stick tape holds it to the window and holds the light to the shade. The rear window has a small rubber trim piece around it. I ran the wire up the side of the window behind the rubber molding, by using credit cards to carefully slip the wire in.
Let me know if you have any questions. Thanks!
Good luck!