Older John Deere grader parts

I've got a JD 570A where the circle drive motor mounting flange is broken, but the motor itself is fine. I'm looking for just that flange piece. Does anyone know where I can find used John Deere parts like this?

Parts Machines - Heavy Equipment Parts | Southern Tractor

Try Weller, 800-255-9325.

Thanks.

Thanks

Can you share some pictures? If it's steel, it might be possible to weld it and add reinforcement.

The part turned out to be cast, and I managed to find one. Thanks for the help.