Naga Tails

Hey just a simple question, but I'm stuck on the Shadow of the Beast quest. I've looked around for a while, and none of the Naga's are dropping Naga Tails to buy the cobblestone with; just Lizard Tails. On my previous account when I did this quest, all of the Naga's dropped the tails, albeit not frequently. I watched youtube clips, and read other forums, and one of them said that the Naga Bruisers and Naga Commanders did not drop the tails, and only the actual Naga's do. I can't find any, so I'm just hoping that if anyone does know where to find any in the swamp or if I'm meant to do something else they could reply? I'm sorry for taking up your time.

 

Hi,

Nearby the farm there should be a pond which has nagas spawning around it, these should still drop naga tails.

 

I didn't even realize Naga's spawned there as they didn't when I was there before. Thanks so much for the reply!