I'd be surprised if George sold ANYTHING! It has been a couple years since I've been to his shop, but he had a whole warehouse full of Indy Lights spec S2 engines.
Don't get me wrong, George is a Great guy, and has forgot more about S2 engine development than many of us will ever know. He was in on the ground floor when Buick was developing the blocks and heads and all the supporting hardware. He wants (or did) an arm and leg for any of his S2 parts/engines.