Give the guys at Ridetech a call...
http://www.ridetech.com/69camaro/ update 33.
They used a standard VA frontrunner (proven entity) and made spacers for the blower snout and a bolt on pulley for the front of the main balancer.
They said once they test it (assuming it works fine) they could make the spacers for anyone that needed them!
Saw the setup in person and it was very clean and looks like a great option!