Elastic

There is very little place for elastic in my sewing. Generally speaking, I just don't sew the kinds of things that use elastic, but I do have a tin of it. I thought I had enough to finish my daughter's fairy costume last night, but I was about 6" short of 3/4" elastic. I've got a couple yards of 1", but that won't fit in the waistband. It's such a disappointment when something should have been finished and isn't.