You need 4 components to get this pack made, and 3 of 4 can be done by a 20 level IF you know what your doing.
1) Get to Shadeweavers thicket and do one of 2 things - farm lesser shades (Lvl 5-8) and Xakra worms (Lvl 2 with 16HP exactly), or if many people are active, offer 5 - 10 pp per stack of
If you have PoP then you might want to look at a couple of quests from the Plane of Knowledge. The ones I did were:
Holly Longtail's Replacement Parts:
Which is very doable as all the items turn up on vendors and results in a AC: +3 HP: