Would this work???
I had an interesting idea while trying to figure a way around the magnet coating. Now maybe i am missing something, BUT, if I am understanding how it works correctly it should work. Why not take a full strength magnet with no coating, and encapsulate it in a glass housing like a firefly filled with saline. The glass is bio safe, the saline (in theory) would both help conduct electromagnetic fields and increase the vibrating sensation. Again, maybe way off, but in my head it makes sense. Thoughts?