There are a couple of sources of implant grade magnet, such as steve haworth and https://cyberise.me/transhumanme/37-sense52.html
I have one of the earlier generations of these magnets implanted and everyone needs to understand the risks. Mine has lost its charge and I hope that it isn’t due to a leak in the silicone and that it isn’t being devoured by my body. It’s probably been pushing a decade now and I am passively looking for someone to remove this implant as well as a rejecting transdermal.
If you do get any of these body mods done, realize that many aren’t going to be forever and you will need to have a removal plan.
Get your beard trimmed at the same time.