KCA-410C is a no-go. Sorry-A.A. never had it. Looking in my system too, we have never had that piece at all either.

I also ran it past Monte at Perpetual and he hasn't seen one in years. He said the same thing I did-keep calling around to the local Alpine dealers. You know the part you need is buried somewhere in a shop's inventory room or in the bottom of an installers roll-around collecting dust for years. The bitch is, finding it. Did you call Andy/Mike at B.O. or Spike/Zach at BLVD? Maybe even Dean at A.I. if you are feeling up to it...