How about those tinted visors that you you can clip onto the car's sunvisor...If you can find a way to clip it on, you would be able to adjust the angle of the visor so that you can look under the visor or thru the visor.
What about those tinted bubble domes that snap on cycle helmets. i've seen those in stores for around $10.
How about the flip-up tinted plastic covers from the old floppy disc holders or the index card holders.
How about the individual plastic (tinted) Cd holders, just sitting over the screen.
I'm going to have to find a solution myself before June 17.
[This message has been edited by MrEd (edited 05-24-2006).]