Hunting for textures

I have cleaned up half of the texture sheet, including removing any shadow, occlusion, plants and wires, however I am stuck on the walls as they are considerably blurry, especially the further from the camera you move.
As a result, I am searching for limestone wall textures as that is the prevalent building material where this house is – apparently.
I am almost there, but colour matching is something that I shall have to look forward to in photoshop.