Think I found the post. Bottom of this page. https://pinside.com/pinball/forum/topic/anyone-tried-to-re-create-the-bally-style-doctor-who-cabinet
"I have the second sample prototype when they retained the "wobble head" and scrapped the rest of the top backbox for initial cost reductions.
This was before they initiated full production, and then temporarily stopped production to no longer support the dalek gearbox and assembly.
The first sample prototype was the one shown in the above photos.
The differences on my machine are wiring, boards, and dalek assembly (and a few other little things), the cabinet is the same as the production run along with the translite.
Based on my records:
4 First Prototype (only two completed)
<10 Second Prototype
<100 First part of the production run before restart ("wobble head" removal)
7450 final run.
These are estimates, as the first machines were in various states of assembly, so I do not know if you really can count them as "finished" products.
Linda most definitely has the original translite artwork somewhere, but I am not an acquaintance.
I have no clue how many of the original backbox plastics were made because they changed the design on that one too, which ended up being the "lost plastic"."