You have to farm instances to be ble to
get heirloom shoulders chest weapon and trinket their is a ring but that is a fishing competition with the kala'uk. Would be
great though
Now with the new HB2, you actually might be able to obtain Heirlooms by using HB2 to do dailies at the argent tournament. If you have the <Crusader> title (Horde: http://www.wowhead.com/achievement=2816 ||| Alliance: http://www.wowhead.com/achievement=2817), you may buy heirlooms with [Champion's Seal] (http://www.wowhead.com/item=44990) obtained through certain dailies. With the questing function working, this might become possible
~UNGR
P.S. This title takes a loooot of time to obtain You have to be exalted status with all five of your factions home cities as well as exalted with The Argent Crusade. In addition, you have to become an argent champion (by doing dailies) with all five of your factions home cities It should all be farmable (assuming the questing will work for the dailies), though!