I tried a screw driver, I tried using my surgical hemostats, The ceramic was really stuck , even though it was already cracked. It seemed like it was fused with really high temp heat? Or glued. I dont think anyone would have glued it. The bits and pieces I chiseled off were stuck to the side of the holder. IT was very odd. Im sure I bent it in my struggle to get the pieces of ceramic off. The bottom pieces were the hardest because of the corners. I dont believe it was any flaw in the part, it was me desperate to get get the slivers of ceramic out. I am sort of a perfectionist and what the Penny to be perfect like it was when I got it.
I think I have the ceramic holder problem solved, someone contacted me with a possible part. I will update soon. I love the Penny and my Odys. I just want to make sure I have enough of the bits and pieces so that I can enjoy them for the rest of my days. There are many great atomizers, including your updated models, but I like the simplicity and build of your Old ones. Perfect for my simple needs.