A backslash without grout is wonderful! Where can it be purchased?

This backsplash looks identical .to the one that I designed for my bathroom a couple years ago. My GC and his painters (some of the best in the DFW area) struggled with bringing my vision to reality. Finally after much creativity they were able to take the metallic paint that I chose and create the wave like patterns on the wall. I believe, if I remember correctly, that the paint was a Sherwin Williams metallic and the waves (lines) were made with wall texture applied using a caulk gun.