Get DK2 Position Relative to Tracking Camera

How can you get the HMD position, relative to the DK2 tracking camera?
My goal is to map out a virtual space that will ‘overlay’ on the real world the same way, with each run…given that the tracking camera will never move.
A good demonstration of what I’m looking to achieve can be seen in Oculus’ Demo Scene’s “Tracking Bounds” option, that shows the camera’s frustum, anchored to the world.

Current environment:
Unity v5.2.1f1 Personal (64bit)
Oculus v1.9 (SDK 0.7.0.0)

Thanks for any help.

I’m interested in the same thing. Have you discovered a way to do this? I need to define the tracking camera position in virtual space that is a replication of a physical space near the tracking camera, such as a round table. The goal is to then draw a 3D display (kind of like a solar system) on the physical space using video pass through augmented reality.