Female Mannequin 3D model is available on CGTrader for $20. Original author: firdz3d. Specs: 1370 polys, 1738 verts.
STL (Stereolithography, filesize: 607 KB), OBJ (OBJ, filesize: 190 KB), 3DS (3D Studio, filesize: 172 KB), FBX (Autodesk FBX, filesize: 650 KB), DAE (Collada, filesize: 628 KB), BLEND (Blender, filesize: 1.24 MB), HRD (High-Res Renderings, filesize: 23.2 MB)