The 2008 Crossfire WDC breakdown is (with the data I have so far, updated 7/23/08):
2004 - 6
2005 - 20
2006 - 2
2007 - 2
2008 - 0
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Coupes - 13
Roadsters - 17
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Limited/2004 - 21
Base - 1
SRT6 - 9
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Alabaster White - 4
Aero Blue - 3
Black - 9
Blaze Red - 1
Bright Silver - 1
Classic Yellow - 2
Graphite Gray - 3
Machine Gray - 1
Oyster - 0
Sapphire Silver Blue - 6
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Looks like we need an Oyster colored one to get them all.

2007 Crossfire WDC data - See post #595.