To heck with the poster use it for the cover on the rest of the Idres Tarot Deck.
Serious I'd love to see such a deck, but posters are to much money for something I don't have room to put up. I know the work in making the images renders it unlikely there would ever be such a deck but hey. I've never been accuse of being reasonable.
I'd buy it as a tee-shirt, Coffee-cup, or, (as previously suggested), as the cover to a deck of cards. The image, I think, works better in the smaller scale... (then again, I like small things- it took me five years to put anything on my apartment wall bigger than 8 1/2x11"... and that was only because someone gave me a framed picture, and intimated they would be deeply offended if it remained stuffed in the storage boxes...)