Custom Album Art sources?

I really dislike Amazon, since it never has the music I want. And if it has, it's bound to be a blurry 200x200 image. Deezer, however, has nice 1200x1200 sharp album art. How can I get Mp3tag to import Album Art from Deezer or other sites?

See the already existing web sources for album art sources:
Or try a more generic approach with Albumartdownloader (freeware).
Or write a web source script.

Hmm, I added Album Art Downloader as a Tool in Mp3tag, and it's working fine. Thanks nonetheless!