Try this. Go to car-part.com and look up the part you are interested in. Pay attention to the questions that the web site asks before doing the search. Look at the year ranges of the parts returned.
When I do the search, MY from 1999-2004 show up. Why? I suspect that the track width of the 2005+ is wider than the 1999-2004. Hence the reason the rear axles will not directly interchange.
So the 05+s still rock an 8.8? That's good info. I'm tired of my locker on the street and have been looking for a good cheap LSD swap to throw in, and that will be a perfect swap since I have Moser 31 spline axles.