My missus is honing her sewing skills to make masks. We are using Hepa vac bags, and high end furnace filters.
I looked through the junk pile and wound up in the recycle barrel. Soda cans cut vertically into strips just less than 3/4 wide, then folded three times over to make a strip, about 1/4 ro 5/16 wide,
Finish flat with hammer, to supply the nose bridge strip. Not the best type of metal, but its what I got.
If you can get into a sewing machine, there are many youtubes on this. I was raised around sewing machines. Was tasked to produce double hems on an industrial machine. Waiting for her to ask for relief.