I am looking for some sort of filter or screen to fit over the rear view mirror on the windscreen of my car. I do a lot of night driving and am bothered by the glare of headlamps fronm cars coming up behind. My own mirror's anti-glare facility is not brilliant, but I am apparently not allowed to change it because of the warranty situation. So, the answer seems to be to fit a filter over the existing mirror.

I have so far been unable to find anything like that in the UK. I wonder if anyone knows of a place in Orlando or elsewhere in the USA selling this sort of thing?