The only photo realistic wood texture including end grain is to take a real life block of wood, trim it, sand it, finish it to the shape that you need, image it and map your images on the geometry. Any other solution looks like cheap plastic coated board or, at best, veneer. Of course in all this your uv map should be strictly un-stretched.

Yes, good 3d procedural wood textures are hard to come by, but they are the only way to image wood properly.