Moondog, I don't have a specific closure in mind. I just know that I don't want a toggle. I've made toggles for tent closures before and find them kind of fumbly. Our Hilleberg has closures that are better, in my opinion. They look a lot like what ofuros posted a link to except that they accept flat eastic webbing instead of elastic cord.
Ofuros, I am impressed with your googling skills. What were your keywords for finding that squeeze hook?
Here're a couple of photos of one of the closures on our Nallo tent:

