Mapleleaf - I use Google Images search for my avatars on a2k. You just have to make sure they are not too large. Once you find an image that is small enough all you need to do is get it's URL, which is listed underneath the image on the google image page. A small number of them won't work for one reason or another, but most do. The instructions on the tutorial page should work, yes.
All The Web is also a good search engine for the invisible web - it regularly turns up results I don't get anywhere else. And
Teoma seems promising too.
ALL THE WEB
TEOMA