steel shot for .410??

I know this sounds crazy, but is there anywhere to get .410 steel shot, or am i going to have to load my own? The reason i ask, is i have a single shot .410 that was my grandpas gun. I’ve shot Pheasant, Quail, Ducks (off our pond at home when i was younger, and didn’t know steel was required… ) I would like to bag a goose with this gun, for sentimental reasons. I know it would be tough, but i’m pretty confident i can make the shot. We’ve been decoying geese in incredible close, and if i can hit a quail, i’m pretty sure i can make a shot on a goose. Thanks in advance.