I went to the Flint ridge park. It is about 5 miles north of I-70 on 668. West of Zanesville and south east of Newark.
There are several dealers up there close to the museum. The museum sells some really nice heat treated bifaces but the cost is high. I got a few anyway. Good thing to support and it is a cool museum if you are up that way. They had a knapper working and nice displays and some trails thru the woods. West of the museum on Flint ridge road is a private museum and shop. I got the untreated rock there for bout 2$/lb. Most of the other dealers were down at a knapp-in in southern OH.
The guy I got it from said he would be interested in trading for some NC rock If I brought some up next time I came. Figure I will head back up that way in the early spring. Will put the word out b4 I go. shoot me a PM and I will give you his name and contact info if you are interested.
sorry to get off topic but I will bring some up to Pat's to play with.
later,
wade