I have ordered two IDPF files from this commercial website:
https://www.goldenarrowresearch.com/
I ordered the files for:
Crew Member (co-pilot):
1st Lt John D Lampman, Jr, O-713798
86th Transport Squadron, Army Air Forces
https://www.abmc.gov/decedent-search/lampman%3Djohn
Passenger:
PFC Harvey G Larson, 37566309
258th Quartermaster Railhead Company
https://www.abmc.gov/decedent-search/larson%3Dharvey
It will take around a month to get them.
Typically the IDPF files for the rest of the crew and passengers will be very similar to the two IDPF files ordered. Usually the same investigators would have done all of them at the same time. Hopefully we will learn something new.