A Cobra guy,
When I needed a new E-M body I used these guys:
Power Performance
They made the original 90" wheelbase bodies for the E-M. They also made pretty much everything else nearly the same, including chassis.
Their number is 515-289-2999.
Don't have any recent experience with them, so if you do get in touch, please leave us a note!
Tom
PS: Another source, Fred, knows more about E-Ms than possibly anyone:
services