mrjoker

I have a 2005 RX330 and I would like to update the Map DVD for the Navigation System. Does anyone know where the DVD unit is located in this model? Also, I checked at the parts department at my local Lexus Dealer and they told me the update DVD is 280 dollars. Is there any other place that may have these for less money? That is pretty steep price to update the Maps. But in my area there are many new streets and highways, so I will need to do it soon. Thanks for the help