these, cheap and reliable
I found some on Amazon with same day delivery (Prime members) but they only come in a 10 pack, so you could buy some and share. These are the only ones on Amazon (that I could find) that came in a reasonable quantity and could get here before the eclipse. https://www.amazon.com/gp/product/B01N9T9CZL/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1