There seems to have been a recent Irish Railway Art Exhibition in Enniskillen. There are a few pictures here - http://www.flickr.com/photos/75395133@N00/7957760870/in/photostream/
Also available in tinlets - http://www.humbrol.com/paints/all-paints/aa7105-209-fluorescent-fire-orange-14ml-gloss-enamel-tinlet/ - for small jobs..
There's a few different shades, I believe. Often available in fishing tackle shops for tarting up floats.
It is a general truism that any television programme about something that you have a bit of knowledge of yourself will be disappointingly superficial at best..
There's a couple of films of that. One, in colour, from about 1970 with John-Boy Walton in the lead role - quite good, but the B&W one from the thirties is superior, I think.