I have just camped Dreadlands 2 hours at the ruins near the FV border and 2 hours near the library. Not a sight of it and so far, only 1 Wraithbone Champion in all that time who was completely unarmed. The only thing I've managed to pick up are 2 Ornate Defiant Gladius, along with a couple of bits of Ornate armor which are no good to me anyway except for a small amount of plat when I sell them.
Beginning to think the site where these things are supposed to drop has been changed, going to try CoM next, hopefully I'll have more luck there.