Warning, this subject is old (5340 days without answer)
clansman
Joined for car and truck information but was astonished at the detail on buses which is my main hobby, one film that seems to have been missed is Restless Natives
http://www.imdb.com/title/tt0089904/ which contains several buses/coaches.
Love the site and if I can get hold of the film I will try to id buses and get screen grabs.