The model in FBX and OBJ files is made for a subdivision. The 3s max file contains a model ready for use inside max. Since the model is made for a subdivision, it is quite easy to edit it to the required dimensions and also change the basic shapes.
OBJ (OBJ, filesize: 87.1 MB), MAX (Autodesk 3ds Max, filesize: 174 MB), FBX (Autodesk FBX, filesize: 174 MB)