One of the sewing needles in your kit would do just fine for drilling in most substances - hope you have more than one. You could probalby just twiddle it in your fingers. I have drilled shell in just a couple of minutes using a chert drill in this manner. Actually if I had to improvise a button type fastener, I think I would go for some sort of toggle and loop gadget,since I might be able to fabricate it more easily out of what I am likely to have handy.