[m&p45acp10+1]

95/5 tin/antimony solder. AKA "plumer's silver" it is lead free solder. It has 95 percent tin, and 5 percent antimony. I use it with WW alloy to make a near Lyman's #2 alloy it is a bit pricey, but still worlds cheaper than buying lyno to alloy with. Any welding supply, hardware, or pluming store will sell it. Most rolls are either 12 ounce, or 1 pound. I pay close to $20 a pound at a welding supply store here. It does not take much when alloying with WW so it goes a long way. I am with the other suggestion in seeing if you can find a BP shooter to trade with. To them that stuff is like gold. Some may even offer you more than a even swap for for pure lead.