Rear Deflector

Has anyone installed a rear air deflector? The back of my TB stays nasty. I had installed one from Weathertech on my Grand Cherokee that worked great, but they no longer offer one. I have seen a few on-line but wonder about the quality. Any info?

On Yahoo's Trailblazer group forum there was quite a long thread about the Lund rear air deflector with pictures, discussion, etc. Bottom line, they look good but don't help much as far as keeping the back glass clean.