I suggest that you make your own. You can find plenty of "junk" silver coins on ebay. Just search for silver coins and junk or scrap and you'll come up with lots of coins that are all worn down enough to not make them collectible. slices from the quarters would make good sight blades. Also the quarters can be hammered out to make thumbpieces etc. Some of these lots on ebay seem pretty pricey, but silver is going for about $28/oz so you have to figure that in.