OW! You are right. That does look like it is cast. An epoxy might work so might the JB Weld. I have used epoxy before and I know it can be painted too to hide the break. I have a friend that is a welder and he has told me in the past that cast metal is difficult to weld but it is possible. You would have to have a good experienced welder to do it if you decided to go that route. That being said, I think I might try something other than welding it then. Good luck to you.