I needed a shade from the sun for my Garmin Nuvi 1300. Customize your own. Be warned... after a couple of days in the hot car, it warped. It was printed in PETG filament. I may have to resort to sheet metal.

Customize this in OpenScad (free). Export to STL. Slice in your favorite slicer (Slic3r). Send g-code to printer.

I would print a partial test print with a zero visor length to make sure you dimensions are accurate. Be sure to flip (rotate on z axis). The top of the visor should be flat on the printer bed.

Full disclosure: I live in Georgia USA were the heat inside a car out in the sun can kill. My PETG visor can't hold up to the heat and it warps. I can generally get the warp flattened back out by putting it on a Pizza stone in the oven at about 200 deg. For me, I can only use my visor from October through March. It might work better in white, but that is a lot of glare on the windshield.