Fris. Maybe it wasn't F-BEEA I recall at Port Morbid? It was certainly a French registered B17, polished aluminium with a day glo orange rudder, mid to late 1960's.
Wonder how long those antiques would last with today's Avgas prices?
The only survey aircraft I recall in PNG were the RAAF Canberras and a few old Queenairs (from Toowoomba?) as they bellowed triumphantly, using the curvature of the earth to defying gravity from PNG Highlands airstrips.