One site not mentioned so far is Cookshill fly tying [url=http://www.cookshill-flytying.co.uk/:eaec4]http://www.cookshill-flytying.co.uk/[/url:eaec4]

However I think that snipe is illegal to own in US unless you shoot it yourself, maybe wrong about that but I think there was a good article in Fly tyer recently about the legality of some of these types of feathers and its rather complicated i seem to remember.
Migratory bird act etc