If you have the drive to succeed, you too can create a functional and sophisticated window shade. Perhaps you recall Dante's House Tour where she used a pulley system made of ribbons and just two points of contact.
On the top, Dante drilled two leather loops attached to glass or metal rings through the thin piece of wood bearing the fabric. One very long piece of ribbon runs across the backs of the two screws, around to the front via the bottom of the shade and finally through both rings. The other end is the end that you pull to raise and lower the shade. This end should be anchored to your wall or window sill. You get to customize the fabric and the mechanism to your liking, with a beautiful result.