Greg I suggest you check with a couple of the hatcheries and ask about their sources and then talk to them. I know a couple of them I checked with , when asked what did they use (other than for fingerlings) said GFC. American Sportfish , Southeastern Pond Mgt and Suttle Fish Farm (I think Suttle does not use GFC ) come to mind as in your general area. Probably others as well. The guys at MSU might also have a contact or maybe go to the source Purina. Their web site has a list of dealers by location (or did last I checked).