Does anyone know where I can find nice bluestone materials?

I can’t seem to find any textures for my model that have bluestone or any type of nice paving stone. it’s almost like paving stone is impossible to come across. I’ve searched the 3D warehouse and 20 different websites and can’t seem to find anything similar to bluestone.

Here is a stone web page i use somethimes, but i am not sure if it works for you…

Architectures have a slate option