The fact that it doesnt need to be implantable, might make it a little easier/ faster / cheaper;
@Satur9 MIGHT be able to help you, he’s been working on some prototype options
Can you take a photo of just the chip?
And one with a torch behind it ( to show the wire connections )
I can’t link you to the most relevant thread about it, you would need to join the club for that,
HOWEVER
This thread should give you a better idea of what I am referring to.
There’s a bunch of stuff in this thread, but heres probably a good place to start