This item is not available in game.
Can only be received once per character per day. The quest can be picked up from a Smokywood Pastures NPC in Ironforge (Alliance) or Orgrimmar (Horde), or from the http://www.wowdb.com/npcs/13636-strange-snowman across from the Abominable Greench's cave in Ruins of Alterac, Hillsbrad Foothills.
This was the 2013 version. For the 2014 & 2015 version, see Stolen Present.