As of December 2012,
Tighar lists 16 survivors:
c/n Owner
1011 Pima ASM, Tucson
1015 Linda Finch. sale to MOF pending
1026 Frederick Patterson III, American Canyon CA
1037 Science museum, London
1042 Grace McGuire
1052 NEAM Bradley Field,, CT
1076 Air maybe n Cert cancel 8/26/2011. Sale reported.
1091 Sold 2011. Rumored rebuilding in US
1095 Fuselage only MOTAT Auckland NZ
1107 Yesterdays Air Force, Sydney
1112 National Aviation Museum in Ottawa
1116 Air Canada (not WCAM)
1130 Restored and on display at Naval Aviation Museum
1138 MOTAT Auckland.
1145 Rob Mackley, Auckland NZ
3501 NASM
Perhaps their owners would have some useful knowledge about Alclad labeling on their Electras. It would be worth asking.