Okay, I'm increasingly convinced.
(1) Same Lindberg model kit (different packaging) from ~1995.
(2) What one of these kits looks like partially assembled
(3) Plastic model seen in id Software lobby in 2011, from the official Bethesda blog
(4) Lost Soul reference image (according to Romero), aspect ratio corrected
It looks like the id guys didn't bother to put the model together properly - the teeth and nasal bones weren't glued in
I was curious last week if it would be possible to mod a digital port (S/PDIF) onto my Roland SC-55 and I think the answer is yes. SC-55's DAC is a UPD6376 and it looks like the AK4103A has the same hardware interface. so you could in theory make a little daughterboard with one on, run some jumper wires from the DAC and fit a S/PDIF output port to the back