I searched for a long time in hopes of finding something to help with my fiver windows.
Never found anything that looked good or did the trick. So after lots of frustration, I measured every window, made frames, covered frames with solar screening and mounted them on the interior window frames up under the metal blinds and secured the bottoms with screen clip which screws into the window frame.
Easy enough to see out, does a terrific job of keeping sun and heat out and when we want to take em down, we just turn bottom clips and they slide down for easy storage behind sofa.