If you or any of your relatives know any farmers in this part of the country, it might be easy to find plenty Osage Orange. In some places it is plentiful enough to be a problem. Whether you know the farmer or not, it would be a good idea to have something to "trade" or show appreciation. I have my eyes on a pretty tree about a mile from my house, and I plan to offer the lady some firewood in exchange and hope for the best. An arrowhead, a piece of basketry or just about anything you might make would be good. Good luck.
Edit: you do know how heavy that stuff is don't you?
WA