Original Soundtrack. Boss music?

I went to Steve Pardo’s website to purchase the Original Soundtrack for GD, but the boss music doesn’t appear to be in it at all. Anyone have any info about this or perhaps even the name of the boss music? I was really looking forward to this. GD’s soundtrack is really great.

I’ve only played up until fighting Warden Krieg. That’s the music I’m looking for. :stuck_out_tongue: Anyway, hopefully someone knows something!