I have a set of "JOINT ARMY NAVY RADIO FACILITY CHARTS" MARKED "JACSPAC" dated Feb 1st 1945 that covers the Pacific but not quite the area you're after. They must have had further coverage to the North East to Alaska. They were "Published by the Authority of the Commanding General Army Airforces by Headquarters, 7th Army Airways Communications System Wing". Marked "Secret" so don't tell anybody! This info might help in a Web Search. (these charts were used by the RAAF thoughout the Pacific.