DPS : ( BoE) Drop from rare mob Fenros in Duskwood ( 31% chance).DPS : ( BoP) Quest reward from Frostmaw in Thunder Bluff.
To make the choice somewhat easier, I have included the drop percentages for certain items as provided by Wowhead. Also note that the order in which these items appear is important the top items are the 'best' in terms of being less time consuming or cheaper to acquire, not the best in absolute numbers. Obviously many possible items were not included as they are clearly the last resort. A 'short' summary of the most applicable items for a Hunter twink.
