I'd be doing a lot of my own footwork for a crossover before spending $267 USD (159 x 1.68) on a set of clutch plates, if thats really the price!
I'm just reluctant to believe Barnett would tool up for a unique part so fast. I'm not worried about this but if anyone get eyes on the piston get a number/measurements/pics of it. It should be a Vertex, and hopefully no exclusive deals made with Beta for replacement parts. I remember the $250+ GG/Wisecos thet you could only get from GG, until you found out a $120 Vertex kit for a TM250 was a perfect match, and then the Wossners and Athenas came online.