Well, technically I did, but Europa reverted and so I lost it. I had finished the quest up till then the day before, I still have the bloodstained book and all. Even one gossamer that I got, a day before killing Sicarii - which was the day Europa reverted. Since then, no spinneret and no sac thing. Have the rules changed so that you don't get the spinny on the first drop anymore, or am I just bugged (and can no longer get one)?