I would check out stumpfl, they are not pull downs but make some nice aluminum framed screens. They are a little pricey, but they have some cool solutions for rear projection. A cheaper solution might be calling around to AV rental companies in your area and see if someone has a used dalite fast fold frame they want to get rid of. You might be able to find a used frame and buy new material for it. Takes 5 minutes to attatch the screen to the frame. The 16:9 is going to be a problem though, since most rear screens like this are made for computer projection in professional applications.