JD, have you seen this link
Full text of "Monthly catalog of United States Government publications"
mentiones the following
"8758 Accident investigation report, Pan American Airways, Annette Island,
Alaska, Oct. 26, 1947; adopted Mar. 21, 1949. [1949.] 5-fii p. il. 4"
[Processed.] f C 31.213 : An 71/3"
maybe they have the charts included that you're looking for...
Martin