Have a look at a collection of 3D scanned materials.
These files are free to use for personal and commercial projects, so you can just grab them and start creating new scenes.
The author 3D scanned each piece and created a set of PBR textures.
The files feature:
The creator note that there are two normal maps included: "one with micro details to use on top of the displacement and a second one with full detail to use on flat geometry."
All the free textures are 2k available in 16bit EXR format. You can learn more and get the files here.