Dont agree that the car is still with us , but I believe that possibly someone of influence or great influence and financial resources would want to recreate or resuscitate this valuable Shelby.
As stated before , this project has been in the works for years.
Not only Mustang / Shelby experts, but many other experts in different non automotive fields are involved. The duplicating and aging the paper work for your paper trail as you mentioned has more than likely been done. You will have witnesses available to testify its validity and existence. This is a major production.
The vehicle may come out as a derelict rebuildable or driveable with patina. Again years in the making.
Once again all the I will be dotted and all the Ts will be crossed...