I know I'm putting this out there for others and not actually doing the hard work myself but...
* Steven Lisberger
* Gary Kurtz
* Mark Hamill
These would be top of my lists for people to contact, Kurtz and Hamill are always at Cons doing signings.
Steven Lisberger - what are the chances that he might be contactable via Tron Legacy director Joseph Kosinski? Does he have a facebook / twitter?
Once again, just putting this out there...