Check out A package of solitaire ring heads engagement 3 prong printable 3D print model 3D model on CGTrader for $4.99. High-quality mesh by BlinkJewellers. 3D Print Ready.
STL (Stereolithography, filesize: 20.9 MB), OBJ (OBJ, filesize: 15.1 MB), 3DM (Rhinoceros 3D, filesize: 24 MB), FBX (Autodesk FBX, filesize: 1.93 MB)