James Ritossa shared a pack of infinite tiles on Gumroad for free.
For optimal experience please use this material at 2048×2048 resolution! You will have to change this in whichever program you use, as it is set at 512×512. This is very easy to change within UE4 or Substance Painter / Designer, or Marmoset.
This pack contains the sbsar file, not featuring the mesh shown on Gumroad. You are not allowed to resell, trade or exchange it. You should also contact the artist about studio pricing.