If the aircraft came down in the sea, either the Arabian Gulf or in the Gulf of Oman the only significant remains would be the four engines, as depending on depth and temperature, the aluminium and canvas components will have rotted over the past 60 years. The notes that started this search suggest the aircraft came down to the west of the Mountains. After more research, the possibility that the aircraft made a land fall in the Musandam seems probable.
    On land the metal components would sit, baked by extreme desert temperatures until buried by hydraulic erosion in the mountains, or shifting sand..  Assuming any - local inhabitants would use the wreckage (that could not be removed) for target practice. (RAF  transport- Valetta no.817 - near Nizwa, Oman 1958 - 1973). As for the crew and passengers, they may have been left to the natural elements. In Oman it was not permissible to bury 'Christians' anywhere inland of Muscat and this may have translated to the suspect mountains area of Sharjah and Fujeraih. 
     In the modern era of incredible aircraft restorations:- aviation milestones from the bottom of Canadian lakes, Hawker fighters from the fields of Kabul,- the Holy Grail of an existing prewar biplane airliner is a powerful attraction. An airliner that was a byword of luxury, the first with an enclosed cockpit, would be a magnificent sight in a museum let alone restored to flight. The passing fancy of politics and strategy seem inconsequential to the monument of the aircraft itself. This idea sewn to the mysterious has probably already doomed its remains to oblivion. Hannibal remains suspended in imagination and time like it's contemporaries - Emelia Earhart's Lockheed, the B24 'Lady be Good',  Glen Miller's Noorduyn Norseman, vehicles of the LRDG in Libya, and sunken ships in the ocean. Each of these is, over time, revealing it's secret, through patient research and scientific analysis.
    Having written the above paragraph, the author found the following on the Aeroplane Monthly website.  "H.P.42 Update... The latest plans to build a flying replica of Handley Page's biplane airliner of the 1930s." (11)  ......