Here are some photos I took of the Aero Commander examples on display: a U-9 at March AFB, and President Eisenhower’s U-4B on display at the NMoUSAF at Wright-Patterson AFB.
U-4B 55-4647 (President Eisenhower)
This U-4B, a U.S. Air Force version of the Aero Commander L-26, was used by President Dwight D. Eisenhower from 1956 to 1960 for short trips.