The best way to get the texture you need is to make it yourself. One the ways to do it is to blend two or more other textures together to get one which fits your needs.
This tutorial explains how to blend two textures together and how to change the colors of a certain range of pixels.
Take any two textures you would like to blend together. It's much better if both textures are sharp and do not have a lot of blurred areas. To make textures sharper try applying the Sharpen filter (Filter > Sharpen > Sharpen) a couple of times.
In this sample I have one texture of a rusty metal plate and another texture of a dirty floor. I'm going to blend the rusty metal plate into the floor texture which means that the layer with the rusty metal plate is on top of the layer with the floor texture in the Layers palette.
Double click on the layer's icon (of the texture which is going to be blended) in the Layers palette to display the Layer Options dialog window. In this tutorial we are only interested in the Underlying layer. You can change the positions of the sliders to get a nice blend. To partially blend pixels, split the triangle sliders by holding down the Alt key and dragging. This will create a more subtle effect.
To change the color of a certain range of pixels create a new layer on top of all texture layers and fill it with the color you want the pixels to be changed to. Double click on the icon of that layer in the Layers palette to display the Layer Options Dialog window. Specify the range of Underlying pixels to make the coloring layer visible only where those pixels are in range.