To my knowledge there isn't an instrumental of this one floating about. I was a little sad about that actually, to see so many cool instrumentals on The Eye, but this unfortunately wasn't one of them :(.
One could try to devocal the thing - I've had a little success with a thing called DART Karaoke Author. Failing that, see if one of the dudes on the remixing forum would help out.
"Your not funny, your not a good musician, theres a difference between being funny and being an idiot, you obviously being the latter" - Dave R Fuller