Stewart Coffin's
Twelve Piece Separation, 3D printed in plastic by Shapeways. Twelve pieces, ten identical, assemble into the shape shown in the photos.
This puzzle is made from their material "polished white strong and flexible". I dyed by myself in four colors, giving it an different look from wood versions. Assembling it so that all the colors going the same direction match makes the puzzle more difficult. Looked at from the right perspective, one can see the Mitsubishi symbol in this puzzle!
This puzzle is fairly difficult to assemble, I do have a solution sheet if you need it. Can be sent either unassembled or assembled. The assembled puzzle is about the size of a tennis ball.
I am sorry that this puzzle is not more inexpensive, but polished 3D printed plastic is not cheap. The fit is excellent and should never change with humidity.