I just wanted to share my recent purchase from eBay. I ordered a new key fob shell as both of mine are starting to show their age and both have the loop missing for attaching a key chain. For $18.99 + shipping, I received the replacement shell in the mail yesterday and am quite happy with the fact that it is identical to the original, only darker in colour (nice!) I'll swap out all the inner parts and replace with new batteries.
The fob was nicely packaged for delivery and comes with complete dismantling instructions which are pretty much identical to the instructions found on this forum...
04 08 Chrysler Crossfire Flip Key Case Free Instruction Keyless Entry Remote Fob | eBay