There are a good number of automatics that can be flat towed. Most of Fords smaller cars can be flat towed with automatics, even those with the CVT transmission, like the Fiesta, Focus, Fusion and C-Max. It does seem like Motorhome Magazine has put their Dinghy Towing Guide on their web site, but you can still find
2014's guide there. When they finally add it, it should be on that link.
Almost all auto manufacturers have their vehicles' owner's manuals online to download. That will be the definitive source. If you call a dealership, you may not get completely accurate information. The owner's manual will tell you.
-Michael