I used a guy on ebay. Just looked him up not much there right now! But he was way cheaper than what I could get them for locally. I bought shanks and teeth. Wish I would have gotten the pins from him too. He had them for 2.25 I paid 3.75. I used 4"X.5" and welded the shanks on. I still warped the flat, but I'm not a welder either.... It still works great though. Hope this helps.