The whole point of this thread is figure out who have it to aid reverse engineering of the digitizer part so it could be documented and shared. Right ?
AFAIK there exist 25 units. But as snout said: you don't know until you ask. Perhaps you can even ask them in a way that is also useful for them: we want to make a new batch ("we produce ourselves, risk is ours") and need your help for the design. Then it might be a win-win.
And indeed. Sunrise won't produce any new batch because of the large amount of manual labour involved (for converting Gfx9000 to Video9000). Producing new Video9000 is not an option for them due to either the price or the availability of the necessary components.
I think they would be very open to sharing the design with a party that has access to the components and the willingness to invest the necessary time and money.