The only way I know of is to get them from someone who is a frame builder. I have a guy who says he will get them for me, though I have yet to feel the need strongly enough. I think it would be unfair for anyone to talk about a deal like that since the builder could get cut off. I would like a single one if that carbon drive system ever starts selling parts for real.

The S&S are certainly the most bling, but there are other ways of making the bike break, that may even be better.