I have searched but have not found.
Do pull up shades exist for the stock back windows of The Chevy Express/ GMC Savana. The windows curve in at the top.
I wouldn't mind some for the stock side windows also
Do you mean day/night RV style shades, the pleated ones on cords? If so, I'm pretty certain those are custom made for each window in every RV. I don't think the curve matters so much if the enclosure built around them is made for it. Still, they will lean in a bit.