Corrupted Norboglir, located in the Malenhad area of Angmar, drop this item. Norbogs are big Neekerbreekers, so you have a better chance at seeing the "chitin and innards" after squishing them ... ? lol Drop rate is rare, so expect a grind to get some for leveling your Scholar tier.
*Have heard reports of this dropping in Ettenmoors off the same kind of mobs. Ettenmoors being the PvMP / MP playing grounds, I do not have first hand experience with the mob / loc / area / rate*
The mobs listed dropping this item are all incorrect, as this item is used in the Tier 5 Scholar "Red Dye Recipe" and Bree-Lands are too low level for the tier. Thanks!