I’m looking at this guy
It’s a bone-anchored transducer excited by an induction coil. There is a magnetically affixed sound processor that transmits power and signal to it:
There is apparently a version of the sound processor that doesn’t have a microphone, and only relays external audio from BT or 3.5mm jack - which is what I’d be looking at, since I can hear natural sounds just fine.
Also, it’s induction, so I’m hoping it can be reversed-engineered and DIY’ed.
If you’re curious to see how the implant is installed, there’s a surgery video (warning: not for the faint of heart):
So, just a tad beyond a body modder’s abilities 