Back side album art originals?

I liked to save the pics of album art from allmusic through inspect and such.

I noticed that the album art pics changed host from rovimusic to allmusic the other day, and now I can't seem to save the original anymore?

I can change the quality from 400 to 1080 in the URL but it's not the actual original size of the album art picture. Anyone know how to save the original back side of cover now after this change?