Lost jacket on Delta flight

This is probably a long shot by now, but my husband left his favorite jacket in the overhead bin on a July 30 Delta flight from SFO to ATL. He realized that he had left it within a few minutes of the time he deplaned, but unfortunately the plane had already moved from the gate by the time he returned - they said it was immediately moved to the tarmac, because another arrival needed the gate.

It was a connecting flight for him - he had a five hour layover before departing on another plane for Europe. Delta gave him a phone number to call, but said he would have to wait until he returned (he had another ATL layover on his return August 12). They assured him the jacket would be in some sort of lost and found at the airport, and he would have no problem getting it back. Hah!

He tried calling the number while at ATL on Aug 12, but was on hold for over a half hour, and finally had to board his flight out. He has since tried calling four times, with the same result --- just left on hold indefinitely with bad music playing.

Not sure if there's still a chance he might retrieve the jacket. It's not the end of the world if he can't, but it's a nice jacket and was one of his favorites. It's probably not replaceable, as he bought it a few years ago in another state from where we live.

He saved his boarding pass, so has seat number and flight info.

Anybody have any ideas as to who/where to write or call (and actually speak to a customer service person)?

Or maybe we should just keep our eye out for it on Ebay ...