M18 Hellcat 3D model is available on CGTrader for $169. Original author: ModelMakr. Specs: 658849 polys.
OBJ (OBJ, filesize: 29.2 MB), MAX (Autodesk 3ds Max, filesize: 46.5 MB), C4D (Cinema 4D, filesize: 21.4 MB), MA (Autodesk Maya, filesize: 28.7 MB), FBX (Autodesk FBX, filesize: 30.5 MB)