Prevent fbx-conv from re-ordering vertices

Hi, it seems that fbx-conv reorders its vertex buffer when dealing with an .obj file according to the order it encounters them in the index buffer. I could not find a flag to prevent this, so I cloned the fbx-conv repo and built it myself hoping to add support for this.

However the version in the repo does not support obj files!

Where can I find the fbx-conv source for importing obj files OR how can I prevent it from re-ordering the vertex buffer. Thanks!