If you live in a city of any moderate size, then these are all "walk in and pick up" items at pretty much any dedicated "fastener supply shop". Try the Yellow Pages (if your area has such a thing).
Cheers
i thought i read on here one time that there were special screws and hard to find. I live in a city of 130k people but often when you goto stores you get someone who doesn't know jack and often they don't have what you need.
I like talking to people who know what they are talking about. Plus being able to order them from my computer chair and knowing I got the right stuff is a plus.