Oh dear. I`m very late to this party, but there are lots of photos of CS2131 in
my gallery, many from the time of my Dad`s ownership.
The original colour is called Dualessence Mist Green. Willment used 'Ford Monaco Red'.
As Trevor said, the chassis issue cannot be proved, but '
them what was there' all seemed to recall that 39PH was repaired after the Nurburgring, not re-chassised. What definitely happened is that the rear wheel arches went from being slightly flared to FiA-style.
The Willment Coupé was never actually registered with the 39PH registration number, and was registered as 77 YPF & UPL 886F after being sold by Willment before being registered 39PE by then Owner, George Pitt.
As for the hardtops, we debated that
HERE starting back in 2003!
It would appear that CS2131 & CSX2138(now) are the only 2 Cobras to
certainly have their original hardtops.