There's a few pudding mob packs in Totorak, but even if they drop it the odds have to land in your favor of the item even going into your inventory.

This seems to be a huge oversight. SE needs to introduce this mob family into the open world. They were a common mob in Mistbeard Cove in 1.0, but that area has now been integrated into Sastasha in ARR and the mobs no longer exist there.