Backgrounds/Wallpapers Creator

We need a designer/illustrator that creates Backgrounds or Wallpaper for a Wallpapers application. We will need to have different packages of Wallpapers (ex: 10 wallpapers about nature,10 wallpapers about baseball sport, 10 wallpapers about iPhone, 10 wallpapers about Hello Kitty, etc) for commercial use. Please do not copy from other wallpapers. We do need full rights for commercial use. Requirements: 1. Experience in creating Backgrounds/Wallpapers 2. Show your portfolio about creating your own Wallpapers 3. All stuff should be vectorial or at least, 2560x1440 as jpeg