WANTED; I'm looking for an Eagle or Lowrance sounder head unit. My Eagle SeaCharter 640 is unstable and the light goes out all the time. Anyone have something from 2004-5 or so? If it is a Lowrance I would need the power cord. already have the transducer c/w blue connector. LOOKING FOR 50 KhZ WITH LOTS OF POWER, SAY 4000 WATTS peak to peak, 500 RMS.