DO NOT attempt to turn the wood with a nail stuck in it ....
REMOVE THE NAIL and then cut, drill, and turn the blank .... MAKE CERTAIN YOU HAVE ALREADY FINISHED THE REST OF THE PEN OR THE SANDING DUST WILL RUIN YOUR WOOD! SEAL IT IN CA!!!!!
Once finished with that, take some LEAD-FREE SOLDER from the plumbing section and snip a piece off, CA glue that into the nail holes, lining them up ... once the CA has set, you can easily and much more safely turn the silver/tin based solder down to the wood. If needed, you can take a small drill bit and clear any CA blocking the nail holes before gluing the bits of solder in place.
Finish over top of the "nail" bits - don't forget to sand and polish them up before applying CA over top of everything. If you didn't seal your blank before sanding the metal, the black metal dust will infiltrate every single open wood pore ... SEAL THE BLANK FIRST BEFORE APPLYING YOUR METAL INLAY.
You can easily take on a project like this yourself, but if you really want someone else to do it, I could probably handle it around the end of February ...