Well there was a brief close association between IM and CMC -
See History of early IM (click on History)-
http://www.intermeccanica.org/
Which states -
"In order to produce the Speedsters, Mr. Frank Reisner formed a partnership with Tony Baumgartner in Santa Ana, California. This company, Automobili Intermeccanica, produced about 600 of these fibreglass-bodied and VW-based beauties before Frank sold off his share to Tony and the whole project was sold to Classic Motor Carriages in Florida." (This must have been around 1977-1978) So initially all came from the exact same body mold.
CMC later let "XXit" hit the fan in FL -
http://www.crankshaftcoalition.com/wiki/images/7/70/Lotsoffingerpointing.pdf
I was always enamored by FiberFab in my youth - They produced many different vehicles and chassis combo. Probably way too many to be profitable --- but way cool cars! When CMC bought them in 1983, CMC killed off all but a few models. Remember the FF Jamaician, Avenger (GT40-like with VW to V8 engine), Valkyrie, 3 wheel Scarab, Aztek, Vagabond dune buggie, Mercedes SSK100, Tiffany, etc.
See -
http://en.wikipedia.org/wiki/Fiberfab
In 2003 FF came back and is now producing replica again!
http://www.fiberfab.us/
Wish IM would bring back the Omega Italia!