I recently ordered a Fenn with stainless steel steering cable. I had the option between that and a self adjusting system, though I do not believe it uses dyneema, but something I assume is similar. So ss is still available.
KR McGregor Rhythm, V10Sport, Swordfish S, Fenn Tarpon S, Fenn XT, Twogood Chalupski, Findeisen Stinger spec. Had: V12, Stellar SE, Huki S1-X, Burton wedge2, Fenn Tarpon