Based on the information that I've found on the online environment, it's said that Vocal Remover Pro can actually remove the voices from tracks, but I doubt you'll have a clean track as that it's not possible unless the creator gives the instrumental file to you.
I've tested and it actually works, but you can still hear them in the background. You should give it a try using the trial version available on the official website: http://www.vocalremoverpro.com/vocal-remover-pro.html
