ScottV makes them.
You can also get them at Crawdads : https://www.crawdadsfishingtackle.co...-crane-swivels (link is to trolling weights with swivels, but he does make them without swivels ... https://www.crawdadsfishingtackle.co...ng-sinkers-2oz ) He also makes them in packs less than 100 weights ... you just have to click on the "Catalog" link and scroll through the pages to find them.