Has anyone here considered creating decks of these cards at ArtsCow.com? There is an active "print-and-play" community at BoardGameGeek.com that has been built up around using this print on demand site. They can print a deck of 54 custom playing cards and ship them as cheap as $5 each (on sale).
I know I would add cards to my collection 54 at a time whenever a sale came up. All that's needed are decent-quality image files for the card fronts and an "official" image for the back. And some time.