Here you can download the Magestorm avatars, and also save most of the custom avatars that already made appearances to disk. If you need some avatar that is not yet on this page, please ask the author of the cartoon you spottet it in.
If you develop a custom avatar yourself, please eMail it to me, too. Thanks everyone for sharing!
To use an avatar, click it with the right mouse button, and select "save target as".