I'd start with contacting either of these companies.
https://www.blupointscan.com/shelby-cobra-427
https://www.3d-dataworld.com/2016/05...-surface-scan/
Another option is find an original and arrange to have it scanned. Not free by far but only takes about an hour.
We use these units (accurate to .0009") for damage reporting, & dimensional reports to engineering for modifications on Biz Jets.
https://www.creaform3d.com/en/portab...r-handyscan-3d