I must say this is a very nice item to use on any int caster, especially necros since you're going to need the HP. I've looked around and there aren't very many items comparable to these, droppable ones at least.
Given by Sarvil Amberstone in DL, also given by NPCs in FV and OT.
1) These conflicted strands are a badge of honor
[b]A Collector's Sarnak War Braid[/b] from Sarnak Berserkers in OT
2) This pouch is crafted from finer things than leather
[b]A collectors Drachnid Web Sack[/b] from Drachnids