Duralast has just about replaced every other filter in AutoZone. The air filters say made in Mexico but I am not sure about the oil filters.
No more Motorcraft, AC Delco, Bosch, STP.
AZ is restructuring their supplier network. Duralast brakes will soon be made by Federal Mogul in Tennessee. From what I hear (the source is an employee) they will be the identical brake parts as supplied to OEM (they do Ford and GM) just stamped with Duralast. The filter situation is probably just a result of new contracts with suppliers, and a new marketing campaign.