Building a CAN API for Arduino DUE

This is a very interesting topic to me, but I cannot see a way to get this library so I can start playing with it. I can figure out how to download the whole fork, but not just the CAN library. Do I need all of it? I have the latest 1.5.x and was hoping to just add this library so I could start investigating.

I want to create a version of this:

but using Due as a basis instead of the LPC chip.

Looking for help to get started with this.

Keith