Is this a missing piece to Jodorowsky'sDune?

Grady Runyon owns a used record store in Ventura, CA. In this video by Rossangeles, Runyon tells a wonderful story about how a stranger asked to meet him in a parking garage to show him a mysterious artifact: an illustrated handbound manuscript with the title "Screenplay by Alexandro JODOROWSKY / Adapted from " DUNE" / by frank HERBERT."

The color pencil drawings in the book are highly detailed outsider art scenes of weird sex, monsters, outlandish costumes, and exotic weapons.