71 Duster: REAR spring hangers.. Can't find new ones

I have the shackles.. was ready to bolt them in, when I saw this: The rear spring hangers are rusted out... GREAT... I know they make new front hangers, as I just bought them, but I am not able to find REAR hangers,... any help?

In the second picture, you can see the tube is rusted, and separated, as you can see the bushing where the metal separated..