I've read the hole discussion and I have to say:
Earlier this year, 5 of my ceph's were suddenly dying.. I thought it was because I kept them too dry, I was surprised because I thought that the pitchers would warn me (by closing them, to protect the liquid level inside the pitcher)..
In one week, almost nothing was left..
I removed all dead plant rests and gave them more water, and after a couple weeks I saw some green stuff. When there was more, I repotted them without disturb them.
Now, I think they all survived it (2 of them are still very vulnerable, but I hope they will do well).
So, I hope you still have the plants, because there is a chance :) (if I had the same 'problem', but it look so)