Here's my interpretation of the timber baulk buffer stop. Actually made from plastic sections - it probably ought to look a bit more distressed than it is. I've given it a base coat of dark grey to cover the white plastic. I'm not sure if the original was painted with black bitumastic , like the rail built type, or just treated like sleepers - which tended to weather to a silvery light grey.

The view below is the same general direction as the photo of the real thing in the link posted by Meil "Do you mean this buffer stop?", in my earlier post (Fairly major cosmetic...)

I did take a photo of the front, but it's out of focus, so I'll have to have another go later.

...and here it is - still a bit blurred, but you will get the idea.

Dave.