Check out your local restaurant equipment stores. Also, look in your phone book under "paper goods" or "restaurant supplies." You'd be surprised about where you might be able to purchase them. When I lived in a small town where I had a coffee shop, I discovered we had a "box" company that had been there over 100 years. Unfortunately, they went out of business while I still had the coffee shop. But, I really stocked up during their "going out of business" sale.