Zinc Bullion?

@SuperDave ... what? Surely I'm not the only one to cast my own.

There is also a company in England that sells all kinds of soft metals for making soldiers in molds. In the old days was called Lead Soldier Molds. Molds used to be iron but the new ones are a form of rubber.
Pending on what you want to make, the metals are Zinc, Lead, Tin and many other soft or easily melted. Many people sill make them, paint them and sell at flea markets or hobby stores.
Most people, however, just use spent Lead from a gun range.
As to just melting down some cents, if you knew what you were doing you could slowly separate the Zimc from the Copper. Wonder how melted pennies would work in those soldier molds?