Who Sings This Song When Afro Samurai Fights The Afro Droid?

They say third time is a charm. Twice I had this question posted and twice I didn't get a correct answer. If anyone who has seen the show or have the dvd. In episode three when Afro defeated the members of the Seven in the hideout. The Afro Droid returns to fight Afro and after a few minutes of fighting between the two. Afro jumps on the droid and the droid takes off and that's when the music begins. I have provided a link from youtube.com:

http://www.youtube.com/watch?v=8Aur23EsbzQ&feature...

(It starts at 2:20 to 3:35)

Also, I guessing it might be the Black Knights and I have checked cd now website and no luck. It's not on the original soundtrack either. DON'T give me a correct answer without a link for genuine proof of where you got the information from. The first one who does this correctly and I verify it will get ten points. This song is driving me so crazy that I have to get this downloaded if it is possible. Thanks and have a great day!!!