The last time I was by Simmons AAF at Bragg, there were D Models operating and parked on the ramp. Don't know what unit they were associated with, but they were definately present.
I was stationed there between 78-81, and the 82nd Aviation Battalion and 1/17th Cav flew guns, then, but don't know the unit structure now.
Remember seeing the first "S" Model Cobra I'd ever seen, sitting under a shelter at Guthrie Stagefield at Rucker in late August 1978... considering it now, that was probably the prototype as "flat window panels" hadn't been seen up to that point. Remember the first Black Hawk landing at the Airfield, attracted about 80% of the personnel within the perimeter, but had already got out before the AH-64's showed up.
I built models that "Al" would hang in "The Hobbit" hobby shop over on Yadkin Road in Fayetteville... Al's still there and always glad to see you! (sorry, couldn't mention Ft. Bragg without mentioning The Hobbit.