I've been intirgued by what members are doing on this site. I also kept a spreadsheet of CdA data, I got all the data from the european magazine
km77. A good number of them post the mfr cdA figures on their site.
The site is in spanish, but the tables are still self explanatory. The technical spec pages can be accessed by clicking on the "Ficha técnica" link for individual models. Also the frontal area figures are metric(m^2), so they'd have to be converted to (ft^2). They don't have info for all cars, but most are covered especially the german and french cars. It seems those manufacturers are more generous with their data.