People used to buy the DAZ Dragon and Eagle JUST to get the wings... which they then moved over to many, many other critters. You can get the "Creature Pack" from DAZ which has lots of parts (wings, horns, tentacles) and use those dragon wings. Traveler has a "Monster Parts" collection over there, too, which may have dragon wings, but I don't think so (it is worth peeking at). There are bat wings in a couple of freestuff places, but they may not be suitable for holding up a dragon (they seemd designed more for demon women or vampires).