I’ve wanted one of these for a long time and I’ve looked at all possible types of torches and components, but I’ve been unable to track anything down and I’m in the UK.
Someone on another forum thought they may have been used for diving, so I asked a photographer friend of mine and his contact specializes in underwater photography / lighting, and collects older lights, torches and catalogues.
Unfortunately, he’d never come across anything similar and wasn’t able to find anything in his reference library. So, another dead end.
The only thing I know for certain is they operate on mains powered, as the cables in a few scenes.
It appears unlikely that I / we are ever going to stumble across whatever they were made from, so it looks like the only way I’m ever going to own a replica is to scratch build it using good old fashioned modelmaking skills with just a hint of 3d printing.