Pair of calipers off a 2004 Lincoln Aviator. These are a substantial upgrade for the 2002-2005 (?) Explorer and Mountaineer. The Aviator has 13" rotors, and the Explorer / Mountaineer have 12" rotors. You'll also need Aviator knuckles, and new rotors, but if you need brakes anyway this is half the parts you need to upgrade.
These were on my daily driven 02 Explorer, which has the larger Aviator brakes, but I pulled them off to install a painted set that I have (3rd pic). Nothing seized, nothing leaks.