I have a few that I can spare. I do watch her close when she is chewing on them because they can splinter, but it's not often though. I also use them for training.......send me your address and I will send you one. or you can look on ebay you can find several on there for sale.
Ask your local meat market! My butcher is super nice, and he is the go-to person for hunters who have excess meat/parts, as well as for folks who want game meat. He isn't allowed to sell any game meat, nor do I think he would if he could (although he'd help out with butchering/cuts if allowed to!).