Rachel
here are a couple of old photos of the basin, I have no idea of the copyright on them and I have no idea of the age. At least on the forum we can withdraw them if there is a copyright claim. Though I don't suppose you can do that with a television programme, so I would advise if you decide that they are useable that you check them out first.
I suppose you have tried the obvious sources such as Carl Chinn, Alton Douglas and others who produce local pictorial history books?