2008 Audi A6 Nav Update
 

Hello
We just bought a 2008 A6, it has MMI Navigation installed but the DVD which is in the Drive is a 2009/2010 Version. Is there an update available and if so, does anyone know where can i get it.
Apparently NavTeq has stopped providing updates to Audi and most of the forums indicate to stay away from Ebay buyers, so I'm kind of confused as to where I can find an update and is it even worth the effort.