Does anyone know where to buy a good privacy screen? I just bought one off eBay and it is a "INSTEN" brand. It blurs the screen a little bit at an angle, but it also leaves line patterns that you can see when the screen is white and the blur really isn't that good. I have seen privacy screens that actually turn the screen black at a small angle. I see that 3M makes one, but it is a little expensive and I'd like to know if anyone has it or any other screen that works well.