I'm looking for a tail tidy for my X as well. There are various tail mods with photos in the forums, just search for "tail tidy".

To buy, I only found the one from off-the-road.de but with that price I'm still looking at pics from members hoping to find something easy enough for me to do.
Here's the link: http://www.off-the-road.de/en/XT-660...XT-660R-X.html