Adding satellite radio to a 2005 range rover
 

I know that for the 2006 range rovers, factory Sirius Satellite radio was added to the navigation and audio system. Is there any way to retrofit my 2005 to have the factory Sirius satellite in my 2005 navigation. I believe from everything that I have researched, the nav systems are the same from 2005 to 2006, except for the Satellite radio.

If anyone knows about this, I would appreciate your help.

Linder