Spoke with the rep from Continental that sold us the engine for the raffle plane. According to him, IF you can find one, they are going for 8 to 10K. Continental is waiting for a run of crankshafts to be made so that they can fill orders for engines that they have sold.
Interestingly, spoke with the rep from Camguard and he says he can find serviceable cranks without much trouble. (but you will pay a hefty price for them)