Well, 12345 would have been too obvious, wouldn't it?
Surely someone in the Houston Area can check out that address and see if it is legit. There must be some kind of old city directory in the library that lists the address of that squadron (and should't it be on an Air Base Post Office and not the general Houston PO?).
Yahoo maps shows that zip-code for 5000 Longmont Dr., Houston, TX is 77056 not 77027 as addressed in memo #1.
Sure: Look up Bush's REAL records, and look at the "mailing address" on his actual Fitness reports (OER's I think is the Air Force term) and his old pay stubs.
Those would have the actual address on them.