Thank you. I used this resource now.
Don't forget guys, if you scroll down on any of the images you click on, then you can download the whole collection of which any image you are looking at is a part of.
These are really pretty good, I open a bunch of them in "crazy bump" which quickly places the image on a 3D object and displaces it. All the images I checked worked perfectly with absolutely no seams, and they all gave really good detail. the displacements were also rather smooth and clean.