As a bit of background, the HUD is a Reflection Technology 'Private Eye' display, which went on to become the display technology behind the Nintendo Virtual Boy. Very neat devices, powered by an 8-bit 68HC05 and very much a self-contained display (though I generally drive them with a Pi these days).
As its over 30 years ago now, the closest you can get is probably Virtual Boys on eBay. Apaert from the pair I have, the only other ones I'm aware of are linked below.
