Gee, you picked a rough one there. Most of the ads I could find involved people and not planes. The only plane ad I could find for Coke is the one to the left. This is directly from a web site. He was not selling the item. You mentioned any market, so I checked out eBay. If you're in the market to buy something, here's one on the right that sold on eBay.
If not in the market to purchase, I hope you enjoy the pictures. Here's a nice poster, but the bid is $125 as of this email.
Coke produced a set called "Airplane Hangers" from 1941 until the end of the war. These were cardboard signs showing American planes winning the war done by the Snyder and Black Advertising Agency. There were four sets total, but the prices on these originals are very high. There was also "Fighting Planes" and a proposed artwork ad from 1942 with the slogans "Keep 'em flying" and "Take off refreshed."
There may have been some other things, but that was the best I could find in a few days. I know that wasn't much help and it may not even be what you're looking for, but I hope it's something kind of neat.