Hi, Nikintheuk
I really like your idea of identifying the buildings used by Superquick as their prototypes. A couple of years ago, I read something (not here, but I can't remember where) that many are "interpretations" of real buildings which were, and hopefully still are, extant in market towns in England. According to memory: The railway buildings and country town buildings are supposed to be from different areas. For example, IIRC then the signal box is ex-LNWR from somewhere in Cheshire, but the Market Building is from somehwere in Hertfordshire or Buckinghamshire. Other buildings are from Oxfordshire, Wiltshire, etc. Basically, whether by accident or by design, the architectural styles are all appropriate to within an hour from "Ambridge". Apologies if you hate The Archers...
The Bilteezi prints were supposed to be photo-prints of real buildings, but I can't track them down at prsent.
regards
cs