I finally got around to laying up a new nose for my car. The pic shows the old standard nose cone next to the new carbon piece. The new part is a pre-preg carbon/honeycomb composite and slightly longer and lower than the original. As a crash structure it's also lighter than the fiberglass nose and its additional crash box. The front wing pillars will slide up inside the nose which I think neater than the more common recess on the outside.
I'll try and post a pic of it on the car later once I've trimmed it.