[FWB]

from what little i see of the front end, it doesn't look like MG but more like mustang II.
no pics of the latch but if you really mean the hinges thats the style alot of models have ...shell valley sells them, the pics your showing are showing parts of the car that are shared by many different manufacturers, if you take some pics of how the frame is tied together underneath and the rear end attachments maybe it will spark some response.
the frame up front by the radiator looks unique......but the crossmember looks like a factory mustang piece...