I really appreciate your posting with the pictures. I have just started researching the exact same retrofit. In my opinion, the in-dash double din looks WAY better than the single din fold out. Not to mention the trans shifter is in the way while in park.
I noticed that there are some problems finding the back cage for the 03-06. I found a site that may solve that issue. This guy developed a double din mount for the 00-02. It looks like it fits right in the stock 00-02 cage.
http://thedetailss.com/
He has pics of a retrofit using the stock bezel, but he had to cut it. I am wondering if the 03-06 bezel with his kit will get the job done fairly easily
I am going to send him some questions next.