Oskar had his head 3D scanned. The eight pieces should be glued around a 2x2x2 Rubik's Cube with 24 mm edges (12 cm cubies). You may buy the inner cube from several sources, e.g. the Twisty Puzzles Shop.
Watch the YouTube video
Read at the Shapeways Forum
Read more at the Twisty Puzzles Forum
Please contact Oskar directly if you are interested in obtaining a fully dyed and assembled sample of this puzzle.