does Lego make bricks with a stone, brick or concrete block design? Does Lego make the bricks with a stone, brick or concrete block finish on the sides?  I would like to use these for walls and buildings on a train layout. Thanks!
As usual with LEGO, the best solution is often to make your own.

You can make quite impressive brick walls using tiles, like this (image from Brickshelf):



There is a tutorial for something similar here.

A range of other techniques can be found in an article called Avoiding the "Big Gray Wall" Syndrome  at Classic-Castle.com. In fact, Google LEGO castles for a great source of inspiration for stonework of all kinds. For example, check this and this out.