The best breeders I know run TurtleStation.com. You can also find Robert&Trish and Chelidman on kingnsnake.com which are also very reputable breeders. If none of them have razorbacks ready to go, then I'd suggest Marc at theTurtlesource.com.
Whatever you do, don't buy from turtleshack.com or turtlesale.com. Possibly the worst of the worst.
Josh H