Came across this new "kit car" web site that appears to have been started in 2016. Very general - but excellent background on CMC and Fiberfab. Amazingly IM not even mentioned - even the early CMC acquisition of IM Speedster molds.
Here's link to the CMC history page as well as CMC advertizing literature and marketing film (ha, most likely distributed on Beta tape).
http://fiberclassics.org/classic-motor-carriages/
and check out the FiberFab link too - although it's on their gazillian other models.