Gav
I think that lot are manufacturers, you want suppliers.
I use Southern Fasteners because they are close. I quite often buy half a dozen or less and they just say, "$1", or "$5" whatever.
http://www.southernfasteners.com.au/screws-bolts-nuts-washers-sockets-supplier
Try this mob, closer to you.
http://www.rgafasteners-psm.com/