Looking for walls that looks more or less than in the attached pics. (These are sandstone from the Free State in South Africa).

It does not have to be named sandstone walls; it just has to look similar to these. I have searched, but it is obviously hard to look for walls that can be named anything under the sun.

At this stage, I don't see anything in the vanilla game, but suggestions are welcome too.

These might be too grey but maybe they would work?

Thank you, @starfishpaws