Here’s a summary of where the survivors can be found:

42-107451, Douglas VC-54C “Sacred Cow”, National Museum of the United States Air Force, Dayton, OH
46-505, Douglas VC-118 “The Independence”, National Museum of the United States Air Force, Dayton, OH
48-0610, Lockheed VC-121 Constellation “Columbine II”, Bridgewater, VA
53-7885, Lockheed VC-121 Constellation “Columbine III”, National Museum of the United States Air Force, Dayton, OH
55-4638, U-4B Aero Commander, National Museum of the United States Air Force, Dayton, OH
58-6970, Boeing VC-137B, SAM 970, Museum of Flight, Seattle, WA
58-6971, Boeing VC-137B, SAM 971, Pima Air & Space Museum, Tucson, AZ
58-6972, Boeing VC-137B, SAM 972, Scrapped
62-6000, Boeing VC-137C, SAM 26000, National Museum of the United States Air Force, Dayton, OH
72-7000, Boeing VC-137C, SAM 27000, Ronald Reagan Presidential Library, Simi Valley, CA
82-8000, Boeing VC-25A, SAM 28000, Active Andrews AFB, MD
92-9000, Boeing VC-25A, SAM 29000, Active Andrews AFB, MD