Contact Mike Furman. He works at Criswell Chevrolet and worked for Malcolm Konner in the 80s. You might be able to reach him by calling him at the dealership.
https://www.criswellcorvette.com/mike-furman
I believe Mike is one of the top Corvette sales people in the nation right now. He posts a lot of old pictures from his Konner days and he may still have contact with the family.