I swear I had found the Cubeoctahedron, only and copied the words from this thread.
You could not find it because Cubeoctahedron is incorrect. It is spelt Cuboctahedron.
You are right about my spelling error. I did not matter, though, because I had copied
and pasted the words into the "Quick Search".
So, the Cuboctahedron was actually the one
I had found before my first post here.
If I read Andreas' post correctly, he has changed something in the Museum in parallel.