Here’s an interesting American modern prototype.
At Holidaysburg Pennsylvania, Curry Rail Service builds little shifter (PRR’s term for switchers) locomotives. They are built upon a truck bogie from an old EMD SD40-2.
These ‘Mighty Mo’s ‘ would make an excellent little model – if one has a broken SD-40 and can work out how to motorise it.
Closer to home, an excursion to the south coast passes through my childhood haunt of Bromley South. It’s 1956, and the Black 5 is hauling several generations of ex-LMS coaching stock.
And how about this in T (yes, T) scale….