I have added a section new to my site. I made wallpapers for your phone and the size are 640 x 1219. The size is for iPhone 5 and will probably work for other phones as well.
Then you can download the wallpapers for free. If you want them as a poster then that is a possibility as well. One thing I forgot to mention is that I am going to be adding more wallpapers and if there is a special request that you have send me an email.