Ok, a couple of things... You'll probably be OK with swapping faceplates. I know for a fact that the Sky face will swap with a Sol radio, for example.That picture is exactly what I was hoping for. Now the only question is the plug-n-play compatibility between the 2008 Cobalt face to my 2007 Sky main unit including the swapping of internals so the face of my radio still looks OEM Sky original. I think the front lenses are the exact same shape and size so I should be able to interchange them. If not, my Sky radio will be black and silver (unlike the Cobalt radio pictured) which might offer a nice black/silver transition between the silver shift area and black above it. I have made a few concessions deviating from OEM with my Sky, for example my black leather steering wheel, and this one seems reasonable as well.
HOWEVER, if you swap just the internals, keeping the Sky front, the Orange filter of your current radio will still be in place, so you won't get the blue-green you're looking for.
See: Migrated my (old) Solstice Radio faceplate to my (new)...