looking for a PIC

[Jumper]

The hard-core way I use is I place normal hole pads for a double sided PCB in suitable positions and then make the board size so the milling machine cuts tru the middle of the pads leaving a half circle plated pad with a half hole that is also plated to be used for soldering.

I think there are other ways too but this one seems to work quite ok. If you choose a really tiny pic package then it could be possible.

[Demon]

If this goes in a keyfob, how about just making an entire new PCB?

It would mean a bit more work on your part, but be simple plug and play for the users.

And where does 12V comes from in a keyfob? That's a lot of batteries, but you have a holder for only a small one?

Robert