Hareball,
I don't buy any of my sinker so I can't help you out there, but...have you considered making your own?
You can buy an electric pot to melt the lead, bead chain and a mold for the trolling weights. Once you have the basic equipment you can also get molds for any type sinker that you use. In the long run it will save you a lot of $.
Get the equipment, a couple of pals, some refreshments and have a sinker making party. Share the expense and cut the price even further. Go to the tire store of your prefference and get tire weights to melt down. If you know the owner/workers they will probably give you the old ones for free.
Just a thought.