Oculus Touch - Hand Tracking IK

Hi

I was wondering if anyone knew of a way to use IK when tracking hands using touch. I have a script that move my hands however my hand mesh also has forearms. So the script is attached to the forearms as they are the root. I would like to attach the script to the hands and use IK to have the forearms follow.

Keep in mind I am a coder not a 3D modeler. So I cannot change the root within the .fbx.

Any ideas?

Thanks in advance.