I bought these weights at the West Palm Beach Antique show in West Palm Beach, Florida. This show/ sale/ festival happens on the first weekend of every month. During the winter months, when it is freezing up here, this show is a great place to go.
I love the West Palm fair because I get to go with my sister, who lives in Florida. It also brings in a more diverse group of antique dealers from more areas in the US. There is a wide variety of merchandise there, both rustic and refined.
Please check their website for schedule and for their "extravangza" show, which brings in more dealers.