No, not the Atramedes intro. The sound files that Nefarian uses during the Maloriak encounter, specifically the heroic version of the encounter, such as 'Your mixtures are weak, Maloriak! They need a little bit more... kick!" as well as the last soundfile where he bestows the titles on the raid. Where are these located in the MPQ files? They aren't under Maloriak or Nefarian as far as I can see, and there isn't actually any folder for Lord Victor Nefarius. Am I mistaken and there weren't actually any soundfiles associated with these /yells?
Even if it's not the MPQ location of the soundfiles, an in-game /script to play them would work perfectly fine as well.