Lots of options! I keep a pair at my machine made by Gold Seal. I've had them for about 40 years. Hadn't sewed in many years and when I started quilting a few years ago I couldn't find them. I bought a small pair of scissors, but my fingers always got caught in the holes. Finally found my Gold Seal in with a bag of old sewing notions and I love them.
http://www.amazon.com/Gold-Seal-Thre.../dp/B00358CTL2
As someone mentioned earlier, I take the "others" to classes and workshops as I don't mind so much if I lose them.