updating my nav disc on both my 07 camry hy and my 07 tundra. someone on this site recomended a lexus dealer to buy my extended warranty and I would like to thank them because they saved me about half of the local dealers price. Now I need two nav dvd's and I was quoted something like $300.00 for a new disc! Does anyone know of a dealer or site where I could buy these for less ? if so Thanks ...JOE