Check out Medieval Helmet 2 Low-poly 3D model on CGTrader for $39. High-quality mesh by slaventina: 1534 polys, 1719 vertices. PBR, Textured, UV Mapped.
MAX (Autodesk 3ds Max, filesize: 11.3 MB), OBJ (OBJ, filesize: 147 KB), FBX (Autodesk FBX, filesize: 316 KB)