The only way of reliably achieving this is to get hold of the multi-track recording, remix the track whilst muting the original vocals, I'm sure the artist would be more than happy to furnish you with a complete copy of the MTs (not).
Seriously, there was a device that claimed to be able to do this, but it was totally crap and made the track unusable. It's not possible to do it reliably of effectively, although a heavily notch-filtered EQ will always have some effect.
Sorry.