I bought the Alpine CHA-S632 MP3 Changer at a local Tweeters store, but they did not have the KCA-130B adapter. I'm having no luck finding finding any place that sells this adapter, or the ACUALP adapter. Where should I go to buy these, either local or online. The salesman thought I had to run the cable directly to the head unit, even when I insisted I could use the factory CD changer cable with an adapter. Also he was clueless about the ACUALP function when I told him it reverses the polarity in one channel to bring both sides in phase. Thanks for the help