It is very tough to lose a close friend and especially a family member, especially when they are young like that. There is no doubt about that.
I have looked through all the Road America negatives I have and unfortunately was not able to find anything pertaining to the Dunbar Corvettes or Camaro. I would think my brother might have something but I have tried in vain for several years to borrow any of it from him. Maybe somebody else will be able to come up with something as more people look in on this thread.