70 Roadrunner & I stripped the captured nut for the upper door hinge on the driver's side. If it were one of the two bolts coming out into the hinge, I would just replace the hinge, but is the bolt that has the captured nut up in the body.

How do I fix it? Where can I find another captured nut?

I've considered two options.
a. replace the nut (if I can get to it & if I can find one)
b. take off the door and see if I can tap the hole a little larger, maybe metric, and find a different body bolt with the "guiding nose" on it.

So what do you guys think? THANK YOU