I have only purchased whole wheat flour at trader joes out here (rochester, ny), and I am pretty sure that there is no OO flour that they sell.
Not to say that every TJ's carries the same stuff.
I bet you could get great results with an unbleached bread flour in your black stone. I use it in my 2stone. In the east, King Arthur is a good go-to brand; out west you will find regional brands. I bet some of the smaller groceries in bend will have what you need.
If you want OO you may have to special order it.
Clay (no, not a joke)