If only somebody made medical grade Bio-safe SCHOTT glass magnet implants, that come pre-loaded in a syringe, and you could choose the magnetic axis 
xG3 V1
xG3 V2
or
a Titanium coated magnet
Just dropping 
these links here, for somebody that stumbles upon this thread, and are searching for a safer and proven option than parlyene coated magnets.
And why not link to this thread for some eye candy 