Peco Jubilee

Front buffer - probably comes with the spare bodies from Peco. They had still had some recently and very cheap. (I know a man who sells a rather nice etched chassis kit to turn them into superb models...). If not, try various spare buffers from the likes of B&H Enterprises, must be something in their ranges which is close enough. You may have to carve off the buffer body back to a plain beam.

Coupling - I think nearly any Arnold style coupler could be made to fit; eg from an old Minitrix wagon.

- Nigel