Fetching cover art from multiple sites at once

Hi! First post here, I was wondering if it was possible to fetch cover art from multiple sites simultaneously, since I really like the Front/Medium from fanart.tv but would also like to fetch Back/Booklet and any type of cover art really…

In other words, I would love to pull fronts and mediums from fanart.tv if possible and then have it fetch the rest of the cover art it finds from other sites, is it possible?

Any help or direction would be appreciated, thanks!