Some glasses or magnifying glasses are inside Jock Lindsey's Hangar Bar. Walk toward the restrooms of the Hangar Bar and study a "Lost & Found" display case along the wall between the restrooms. In the middle of the display case, do these copper circles (lenses?) form a classic Mickey?
In the Backlot Express Restaurant - Clue: Go to the side of the room then look for Mickey! Hint: Follow the clue and turn facing a lone table and a locked display case. The plate is on the left side (Note: there is one head but two sets of ears).
At the very back of the island, at Fort Langhorn, is this image hanging on the left side of the outside wall of the Blacksmith's shop inside the fort. At the far left of the wall, markings on the side of a lower piece of horse bridle gear might form an upside-down classic Hidden Mickey.
Walk inside Sid Cahuenga's Antiques and Curios, which is now a MyMagic+ service center. In the rooms at the right side of the shop, you can find remnants of the original shop, like these cameras on an upper shelf along the right wall of the room at the rear. Is there a classic (three-circle) Hidden Mickey on the front of the cameras?