[BBCAM]

The issue with these cars is they are OLD and have probably been through many owners and usually (most) have not recieved the greatest care over the years..
and add on to that, auction dealers and unscrupuless dealers and Profiteers that try to pass sub standard cars as Rare original ones make finding an actual low mile original car that much harder ..
Ebay is not where I would be looking for the most part I would try Publications like Hemmings and also plan on traveling to inspect a car your self or hire someone who is able to do so ..
it's so hard to document anything that is that old unless you can find an original owner ...
I wish you luck...