Hello,
I just bought a release cable yesterday from Barnets VW in St Andrews £42 they still make the cable new but the horns that fix onto the wire are now obsolete. You can buy stainless ones from america but they are about $95 plus shipping. If you havent tried to remove the horns/clamps be very carfull and use plenty of WD40 as the bolt that screws into the horn/cable clamp will be sezied soild and will snap. I am going to have to drill the bolt out of mine and put a new cable clamp on behind the existing horn/clamp. Provided i can actually get it off.