Wait, you wanted a desktop wallpaper, or screensaver? Anyways, what resolution do you have / what do you want on it? (depends on if I can find high quality, large stocks for whatever you want that will decide whether or not I do this.)
As for the Raven one, do you want the height to be that tall as well, or is it just the width that is specific? Also, as for images, I did a quick google search, and there are so many different styles and whatnot, so if you pick one, I can render it as well, so that's no issue. But really I don't know exactly what you want, so as long as you can find an image which I won't need to make bigger, it should be fine.