This is something interesting I found, I'll link people to the actual site where I got this from in case of any updates and just because the guys done an awesome job, all previews included, here you go.
Download them here: http://www.redmondpie.com/windows-7-box-art-themes-and-wallpapers/
Download them here: http://www.redmondpie.com/windows-7-box-art-themes-and-wallpapers/
