The pick-n-pull near me has a couple of CTSs. According to row52.com, one of them is a 2005, but I haven't checked it out to see what the interior color is or what's left of it. If I head that way in the near future I can see about grabbing that piece for you. (I need to get the passenger side dash vent, so I'll be looking for dash bits already.)
Honestly haven't had time and when I did its to cold. Finally getting some nice weather this week, but haven't had time because we just bought a 2007 Tahoe LTZ and have been working on the few things that it needed.