Amazon.com: Bits and Pieces - Black/Silver Yin and Yang Metal Brainteaser Puzzle-Metal Puzzle Brainteaser, Nickel-Plated - Measures 2-1/2" in Diameter : Toys & Games
Overarching Opposites mandala puzzle - Unidragon
Magical Two Worlds Yin Yang - Wooden Jigsaw Puzzle – PuzzlesUp
3D Printable 10 piece Yin and Yang puzzle by Maxwell Windland