Have you checked with Hobbs? The second dialog option.
The item was there, like you said 
Thank u very much ^^
Showing Posts For LinkinParkBoy.7932:
Hi Guys,
As the title says, i deleted the Spider Silk Insulation by mistake. Its there a way to recovery it?
“Spider Silk Insulation is a trophy required for the Nevermore IV: The Raven Spirit legendary weapon collection.”
I already killed the Veteran Spider Queen in Darkwound Defile many times and nothing, only dropped 1 time, (The deleted one).
I need that Item to do The Hatching.
“Acquisition”
Ensure you have Raven Egg, Incubation Box, Warming Stone and Spider Silk Insulation on your character and then run through the lava inside Mount Maelstrom."
Many Thanks.