Here is the track Long Live Metallica and it's funny as hell but still listenable as well. I have no clue who these guys are but it seems they are parody tribute metal.
Anyone who can do Another Brick in the Wall as a heavy rocker and Ace of Spades as a ballad get my vote! (yes...also on amazon mp3....not sure how that works on amazon uk...but mp3's aren't regional so I'd think it's all good!)