I had forgotten that Chevrolet offers these pop-up window coverings for the Express van. The pop-ups offer security when closed, and a built-in sun screen when open. You'd have to add insect screen on the inside.
I found this photo in an article about the 2015 NTEA Work Truck show
http://www.trucktrend.com/events/1508-the-2015-ntea-work-truck-show/
