I have a 2005 RX-8 with the factory nav system. I am planning a cross-country trip in July 2011 and I'd like to replace the 2005 CD with a newer one, since new streets and highways have been added to our national system. Can anyone tell me who manufactures the CD and where I can buy one?

Thanks for any help you can give me!

 

Navtech makes the software . I've seen them on the the Navtech web site and (of course) EBAY.
If you buy the updated disc, Do you want to sell your 2005 version? I bought my 2004 this past spring. While it was on the car lot, someone stole the radio and the nav disc, but they didn't steal the nav unit. I don't really care if the map is old or not, I just don't like having something in the 8 that doesn't work. It just burns me up.