I can't give Du an exact address for a higher quality version, but I can help Du find one you're happy with.
If Du Suchen via Google Images, they have a new feature where Du can Suchen Von using a picture Du have. As Du look at the Suchen bar, at the very right end is a pic of a camera - click it. Then Du can either input an URL for the picture, oder choose to Upload it from your computer files.
Google will then Suchen out this specific pic and compile a grid listing of all the versions it could find. To get to the listing for the pic, you'll need to click on the thumbnail of the pic at the oben, nach oben of the Suchen results page. You'll be redirected to the different versions of the Foto Du searched for.