As already mentioned somewhere here, John Mayne is planning a re-run of his excellent "tin vans", and Silverfox do a green one as well as a black'n'tan one.
It can't emphasised enough - for those who pursue accuracy, tin vans are a necessary feature of all 1960s trains, great and small - with the very few exceptions of the unique Loughrea coach, and a couple of sets of old wooden vehicles for summer use in Cork and Dublin.
The very nature of PW trains don't lend themselves to be included in Working Timetables, as they require to be ran to and from various locations at various times. There could have been major long-term works on the Galway/Westport line at the time which did actually warrant fixed paths. I doubt they always ran!