Reply from a CL vendor when I asked him what type of wheel he was selling (All he put in the ad was that they were KSyriums).

"They're actually SSL (http://www.pedalpushersonline.com/?CID=886) which superseded the Elite, SL, and ES lines. They are 700c clinchers."

So there you have it, Mavic have discontinued their Elite and SL wheel lines. You heard it first right here on bikeforums.net :-D