There is no artwork like that for the whole series, that I know of. I did make alternate cases for the series, and a couple were double cases, and I believe one triple case (the UK premieres) All of those cover arts are available at www.fanedit.org and here: http://www.avpsgallery.fanedit.org/thumbnails.php?album=7
You'll need to register to avpsgallery to access all the covers, but all of babyhums stuff (official covers, and alternates) is on that page.