Yes, I did look at Loco Shed but the stock listed by them under North British is all circa 1850 - I am looking for the late Drummond, Holmes and Reid period, say 1885 through to 1920. A fair portion of these loco's and rolling stock lasted through to the 1940's - a few items even into the 1950 and early 1960's.
I had a 7mm scale model layout based loosely around the St Andrews/Lochty area a 2/3 years back and had some vague idea repeating the exercise in Trainz SP2 but it would be somewhat pointless unless some suitable quality stock were readily available. A Holmes 4-4-0 and J36 would be a good starting point.
Many thanks anyway for your suggestion.
John