I'm pretty sure you'd have to book that through Disney to get it. What Orbitz sells is a room and tickets, not a room/ticket package.
I'm another who used Orbitz and had no problems. It is a great deal provided you are prepared to pay in full at time of booking. That's really the only negative, provided you are not after a package including dining (either free or paid). Worth noting that while you do pay in full at the time you book you can still get a refund up till about 2 days before the trip (give or take the # of days)
Another advantage I found was Orbitz had rooms where Disney showed the Resort as sold out, even with rack rate. Not only did Orbitz have a room that I wanted, they had it at the promo rate and I could use the Orbitz promo and earn Orbitz bucks to use on a future reservation. I guess Disney must give blocks of rooms to Orbitz as opposed to them working with the same pool of rooms. No other reason I can think of for Orbitz to show rooms where Disney showed none. This was for several resorts, not just the one I was booking.