Is there an album artwork finder for 1000's of songs? Automated?

I was wondering if there is an automated album artwork finder that automatically takes its best guess according to the title/name/album. I have most of my itunes library with artwork, but the rest of my collection does not have artwork and it seems like it would take forever to add one by one. I have seen the itunes album artwork finder, but you still have to add the uncompressed files one by one. Any ideas of a way to automate all the songs without artwork? Thank you!

Please use the search function in the forum.
See e.g.