I have an olde C-Class (96) which I want to install a later headunit and cd changer which use the fiber optic connection. The problem is in actually getting a pair of fiber optic cables. The local dealer can't find them and the wrecking yards I have checked with don't have anything that new. Anyone know of a place where I can get the cables or a part number I can go to the dealer with? Also, how much should I expect to pay? Thanks.