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You can use this link below to find a dealer, there is a thin chance he can get the part you need.
I do not see your units model number listed, can you tell me how old the unit is approximately? If it is over 10 or 20 years old the chances of getting a cast iron part for it low.
You can however have the leg brazed back in place, or cast iron welding done on it. If you can tell me which direction you are from the center of the nearest city I can look for a portable welding outfit that might be able to do that for you.