OH MAN!!!! Absolutely hate to hear this!! I would be livid if this happened to me, especially if I had spent all the money to go out west and it was a once in a lifetime trophy!! I would keep digging if I were you to try and get some sort of information on where your birds are, I really hope you find them and everything is ok.
I have a taxidermist here in WV that has done all of my mounts and does an amazing job. I will tell you this though, I would let alot of people mount a deer for me, but I definitely wouldnt let just anyone do a turkey mount!! They are a totally different ball game when it comes to good looking mounts and some guys can do them and some guys say they can, but cant!! You get what you pay for!
So sorry to hear this man!! Absolutely sick for you.