I'm looking at getting the fifteen G cranks. Have any of you seen these at your local shop, or is it an online-only type of item? After flipping through some catalogs of well known vendors (QBP, Hawley, B&J, etc.) at my LBS I didn't see these cranks? Granted, I might have missed them somewhere. Is this an item where the shop has to sign up as a vendor directly through the company just to get the crank?