Northrop Gamma 2D TWA Mail Express #16

Looking for location of wreck. Northrop Gamma 2D, serial number #8, TWA fleet Number #16, United States registration numbers, NR-13757. Personal plane of legendary aviator, Jack Frye, long-time TWA President and founder. Sold by TWA around 1942, and drafted as a Army Corp of Engineers plane, lost in Africa in about 1942 during the war. Does anyone know of the wreck site? Any wreckage ever recovered? Has it ever been investigated? I am interested in the acquisition and restoration of this plane. Any information on the other 2) TWA Northrop Gammas: NC-13758, NC-13759 would be appreciated.

Please see:

http://www.sedonalegendhelenfrye.com/page19

http://www.sedonalegendhelenfrye.com/page98

Thank you, Randall