There are plenty of places in free America to buy mags. If you get caught with a mag that is legal in other states but illegal here, welp you're in a world of shit.
Best advice I can offer.... Move out of NY to a free state where you don't have to worry about breaking laws.
Or just bury your magazines in the woods. That's what I used to do with my Playboy and Hustler magazines when I was a kid. If they aren't in your possession, it's not illegal.