I'll help you look if you can narrow my search. You want cartoon version Paul, correct? If you also want it with just him, the search will be a bit more difficult, but cropping pictures is an option as well.
What I'd do is look for images on google, save the one I like to my computer, upload it to livejournal in the photo editor, and cut it until it looks good. Or, if you like a more refined look, you can edit the picture on a program and make it 100x100 before uploading it. Making specific icons are usually more simple than looking for them.