I, too, like doing business with Tom at GAHCO. He is willing to sell in small batches when some are not. I have also had good luck at Bonaero.com in the past. However, I will usually order from Van's if they have what I need. They can ship via USPS and that is usually the cheapest shipping and is very reliable in my experience.
Aircraft Spruce now offers USPS as an option for small orders. I usually get overnight or second-day service from their East warehouse and only pay $4.80 for priority mail. This makes it a little easier to justify a small online hardware purchase. Make sure all items are in the warehouse closest to you so you don't get caught in the back-order routine.