where did the AOE cars come from?

I was wondering if anyone here knew what railroads the American Orient Express passenger cars came from. is there a website that lists their heritage?

Since no one will ever make a decent model of this train, I figure that if i knew what railroads the cars came from, I could track down individual brass or plastic models and make up my own train.

any help you can give would be greatly appreciated.

http://www.trainweb.org/passengercars/

Look under AEE/AOE listing. This will give you a good look at the cars.