The zinc article is in Handloaders digest #12. Not as easy as I had remembered. He used custom iron molds with larger sprue and had to heat the zinc to a higher temp. They also must be groove diameter or less and can't be swagged like I thought.

Couple of people used to sell them but not sure now.

There are plastic bullets in 25 cal but only good for short range. Not sure what else is available.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli