I'm not joking... show it to your dentist. He may give you a bit for your hi-speed dremel.
I restored an antique clock for my dentist. He handed me a small box of assorted drill tools,
saying "here, I'll bet you will need these".
That old clock had tapered brass pegs, with 100 years of corrosion.
Also, the model train guys have micro-machine tools.
I once had a set of left-thread screws extractors,,, but a #6 torx is really small.