My understanding of the law (which is extremely limited) is that possession of any part of a raptor is strictly prohibited, with exceptions made for Native Religious purposes. Various vendors carry museum quality resin skulls and talons, and there a fake feathers to be had. Several years back, a friend of mine on the Rendezvous circuit produced reproduction hawk and eagle feathers through careful use of scissors and an airbrush. He got what I at the time considered an insane price for them.