FWIW this is also a relaitvley common practice for administrators when dealing with bankrupt companies. Donating goods they can't sell is often cheaper than storing them or paying for them to be disposed of!
ZA001 Went to Nagoya, Japan.
ZA002 Went to Pima Air and Space Museum (as you noted).
ZA003 Went to the Museum of Flight in Seattle.
As for the other three:
ZA004 may still be with Boeing.
ZA005 was scrapped.
ZA006 appears to have been sold to Mexico for a VIP transport.