Contact the Corvette Museum and discuss with them about tracking down the history of the paint. It may take some time but they should be able to help point you in the correct direction.
If it is documented and you can get another NCRS value of some status will help.
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
Threaded Mode