Looking for the original maps/guides

[m610]

Hi,
I posted in the Bikecentennial section, but it seems to be about dead. I won't repeat my whole post here, but briefly, I am trying to write up my 1979 ride from NC to CA, a good portion of which was on the original Bikecentenial route. My copies of the guides are long gone and having a set would greatly help me sort out many of the details of my journey. Google Maps helps, but a 1979 Google Maps would be more helpful.

Anyway, I can't find copies on eBay or Amazon. Does anyone know of another source? I'll check our local and university libraries, but I'd really like to own a set. (I have the guide for the easternmost route.)

Thanks, Mike