People continue to ask me to send them magnets, but unfortunately I am no longer doing so for several reasons:
The first and foremost is liability and exposure to potential litigation. My significant other brought this to my attention, and insisted that I immediately stop mailing out magnets. While I'd like to think that people are reasonable and accept personal responsibility for whatever happens after jamming a stirring magnet into their finger, it was brought to my attention that in today's lawsuit-happy world this doesn't matter. Even with firm legal ground to stand on, defending against litigation can be a financially ruining sequence of events.
Then there's the time and money involved. This is not a money-making venture. I ask for a few bucks to cover the cost of magnets, shipping materials, etc, but in the end I don't even break even. It's very time consuming to carefully select and package magnets into individual bags. I was sending them out because I wanted to share the opportunity to have a magnetic sense, not to make money.
Finally, it's a largely thankless venture. I would be much more apt to continue accepting the risk and donating the time to get magnets to people, but after sending them I rarely ever hear from the person again. To the few that have, THANKS! It's really cool seeing people take the plunge and doing interesting things with their new sense. But more often, since I take quite some time to send them out, people become very insistent. "I SENT YOU MONEY A WEEK AGO WHERE ARE MY MAGNETS?!" Sure, it's not good business to promptly ship, but I'm not running a business.
Sorry I can't provide an easy and cheap source for you to obtain magnets. I'll continue to update this blog with my experiences, but you're on your own when it comes to locating a viable implantable magnet. I've given plenty of sources in blog posts, so it shouldn't be too hard. Good luck!