I have located a company that does custom zinc casting. I am considering contacting them and getting a quote for casting up a quantity of zinc round ball for my pop can Dictator mortar.
I don't know cost or details yet.
Is there any one else who might be interested in getting some zinc pop can size roundballs? You would have to make you own arrangements while the mould was at the casters.
Zinc pop can round ball weighs just under 2 1/2 lbs