Are you looking for something like this?

http://www.google.com/imgres?imgurl=...ed=0CDsQ9QEwAA

It's not a kit, and I'm not sure where they had it done.

The shop that did my hood, (Customs Unlimited in Hartville Ohio) could build you a removable hardtop. (I always thought the C1 Corvette Style removable hardtop would look great on a Crossfire.)
As a one off, it would probably cost around $5k. (But that's just a guess).
There was another "Wide Body" custom Crossfire in yellow that appears from time to time on EBAY, but I couldn't find it when I did a search. Maybe somebody else could be more lucky finding it.
Good Luck with your mods.