Happened to find this web site today. LOTS of photos of old professional cars, auto accidents (including ambulances) and funeral homes. The PCS site is even mentioned! Not sure if this site was ever mentioned here. Two of Paul's cars are in the "high-top ambulance" group.
http://www.flickr.com/photos/drmo/5744905470/in/photostream
http://www.flickr.com/photos/drmo/5744905470/in/photostream