There is a lot in what you say, Brad. It is worth pursuing. I had the same info as many of us as to the "exclusivity" of this set. On the other hand, CD Universe does tend to jump the gun on some of their advance orders. I ordered those Django discs as well some time ago and still nothing.
Still its worth a telephone call and like you say it may lead to some type of re-imbursement if Stateside is a reputable outfit, even if they are selling Art Ensemble discs now.