Suppose a guy could come up with a 70s model Series I, without the power supply, can one be ordered from Alembic. How much? Also, I read about the batteries being smaller than regular 9V and can still be bought in the medical field. I don't have a handle on this, not to mention the need for an electronics upgrade due to RF. HOw much is this? Any help, or point to a previous thread would be appreciated? Thanks....