D&D General Legal way to pick up any version of Caverns of Thracia pdf?

[Alzrius]

So far, to my knowledge, the only place you can get a Judges Guild related product/pdf is the 5E Tegal Manor on Frog God Games' website.

Bat in the Attic Games (affiliate link) still has some Judges Guild-related material for sale. I'm not sure precisely how the rights are parsed there, but given how they were one of the first to disavow Bledsaw II for what he said, I feel confident that none of the proceeds from those products go to him.