Contacts
Here are some resources for the bartending and cocktail industry that haven't yet gotten onto the web

Fee Brothers

These people are the only source I know of in the U.S. for Orange Bitters. Give them a call. A whole case of orange bitters cost less then a bottle of good Gin. And it will last you a lot longer.

Fee Brothers
453 Portland Ave.
Rochester, NY 14605
USA
(716) 544-9530

They also carry a wide assortment of other mixers, syrups, and other such beverage oriented supplies.