I seems to me that restoring a Cobra replica after being "damaged badly" in a struture fire wouldn't be nearly as cost efficient as buying a used one, even if the used one needed a new body and suspension. If it had been wrapped around a tree, or otherwise compromised in the main frame members, I would pass on that, too.
Conversely, if I had some kind of emotional connection with the car (Dad's car, brother's car, etc...) I'd try to get back on the road, regardless of cost, if it were possible. In your case, I've never heard of Johnex before. Try this:
http://contact.johnex3motorsports.com/
Best of luck to you, whichever way you decide.
Eric