Try Ford's Mustang configurator. It lets you create your own Mustang just how you want it to look, then turn it into wallpaper once you're finished tweaking the looks.
http://www.fordvehicles.com/the2010mustang/
Have a go yourself. This is what mine came out like.
http://www.fordvehicles.com/the2010mustang/
Have a go yourself. This is what mine came out like.