Run an ad on Craigslist "Wanted: scrap lead"
Say something like:
"Paying 35¢ a pound for wheel weights, and 45¢ for lead pipe, battery terminals, and flashing. Really good stuff is negotiable. No battery plates, please."
I got over 300 pounds of pure lead foundry ingots a few years ago that way. Paid $120 for the lot of it.
"The only way to stop a bad guy with a gun is with a good guy with a gun"