Thunder does exist, I have seen it.
It sat beside the Dave Colbert Z-11 I purchased a few years ago. Fortunately, mine was not stored like Thunder.
However, Thunder is a pile of rust with no trim tag nor even the "actual cowl" where the trim tag is supposed to be.
Really sad.
To restore would require both front doors, both rear 1/4 panels, all the floor pans, both wheel houses, both rockers, an original Z-11 cowl( or cut the air cleaner hole), a frame and almost anything steel on the car.
There is no engine or transmission either.
Most of the aluminum is there, not all.
Then what would be left to claim its the real car.
So very sad for a car like this to be left outside for so many years.
Now, someone could get a donor car, create a tribute/original car and use various pieces in places to have some real parts on it, but claim only what it really is. Some of the actual Thunder lettering can be seen faded on the 1/4's.
Probably the best way is to be very open about what is being built, show all the photos of the entire restoration project.
That would be the best way to memorialize this very special and famous Z-11. I believe the support from the "W" crowd would be exciting to see the actual car out in daylight with a new future.
I know of a person that found a very special Ferrari. It was hidden under an old 1950's era Devon fiberglass body. The original body was long ago cut off. My friend purchased the 1952 Ferrari and he is building back the car it once was. It is estimated to be worth $2.8 million when finished. In no way am I comparing these 2 cars, the Ferrari is either the only one or just a couple.
The point is an original car with the original serial number can be built back and relive some of its past glory, but only with full disclosure, not cheap by any means.