I stumbled on this while Googling for Crossfire plastic or die cast models (anyone have a good line on these by the way??) - it's an overview of the load floor/trunk separator composite piece in the Crossfire, titled.
Crossfire™ Roadster Sports 1-Piece Load Floor / Trunk Separator
Molded from Lightweight Glass-Reinforced Thermoplastic Composites
I did a search here at crossfireforum and didn't find it, so if this has been discussed previously I apologize. Document available in PDF format
HERE