I've been seeing it in stores lately, though...
I checked borders.com and three stores in Northern California near me have them listed The U.S. Games green box version. I actually bought a purple box version recently, having a choice of either at a local Borders.
It may be that those in stock at European distributors like tarotchest.com or to U.S. stores such as Borders might come direct from AG Mueller? AG Mueller used to supply some titles such as Roots of Asia, Via Tarot, Old Path and other decks such as the Thoth to be distributed by U.S. Games in the U.S.---some of those decks still seem to be in print in Europe and show up in shops that will order AG Mueller titles...but periodically I see such a title labelled "Out of Print" in the U.S.
I hope that helps if you are looking for that deck.
Cerulean