Looted stacks at NG and disco bugs over the years. That will be your quickest most reliable spot. With highest drop rates

I remember on live getting BD'S in the undead tower in The Hole.

No one wants to talk about Soblohg? It is a really low drop rate I guess. :)

Yeah. While I'm only killing Soblohg about an hour or so a day, it's been about a month since I've seen a BD.