I had been wanting a "Killdeer" style rifle for awhile, even though I personally did'nt like the shape of the buttstock that much. In trying to find someone who could make me a similiar rifle, I came across Bill Rooks who used to make replicas of it. He doesnt make them anymore but he can give you specs and a traced outline of it if you ask him. He got that tracing from the original builder of the "Killdeer" gun Wayne Watson. Here is his contact info.
Hope this helps a bit, I hope someone has a few photos out there.I would love to see photos of it other than just watching the movie a bajillion times.
William Rooks
PO Box 691
Sun Prairie, WI 53590
608-825-8132