The '54 Eagle in SIA #15 was a very low mileage original car, owned by Richard Carpenter, of the musical group. I got to examine this totally unaltered car many years ago, taking pictures of the original cloth inserts for the seats and other perishables. The car was sold about 30 years ago and went to Alaska if I remember correctly.
There have been several magazine articles about Aero history: Car Classics, Cars & Parts, Collectable Automobile. Charlotte Dayton's '55 4-door was a "Driveable Dream" car in Hemmings Classic Cars a few years back. There was also a comparison article in SIA with the Hudson Jet, Rambler and an Aero not long before the magazine was discontinued.