Mo, go on Do-It mold web site and request a catalog. It will show you all the molds they offer. You can buy them cheaper by shopping around. I have bought a couple from Grizzly Jig. And ScottV posted a site on jig tying forum up in Kansas city that has all kinds of molds as cheap as anywhere. Sorry I can't remember site name. Like G said go to tire stores and get wheel weights. It will work great for pouring those larger weights. Just find a pot to melt it in on your burner, lasso off the metal clips because they will float on top. Then flux it with some small chunks of candle. That will separate all the trash and you can skim it off. Then your ready to pour.
Proud Member of Team Geezer
Charlie Weaver USN/ENC 1965-1979