I wonder if anyone knows of a source of headlamp/light casings for the ends of diesel locos?

Tiny little surface detail, I know, but worth adding if available

Thanks

Adrian

Hi Adrian;
I think Ratio make the high intensity headlights, if that is what you mean.
HTH
Martyn

See Peco website

Are you looking for just the fitment or a surround so that you can insert a LED filament?

As above, for just the fitment the Ratio headlamp is ideal
You could drill the middle and insert a LED filament, but you would need the correct tools for this!

I used to have two packs of these, if I can find them...