70 duster rear shackle part number options?

I was changing out my leaf spring bushings and when I tightened up my shackle bolts I snapped one off. It had some rust and perhaps I tightened it a hair too much regardless I need a replacement. I can only find info on the AC delco one see pic attached , but it’s sold out most places online. Any other options? I know I can drill out the stud and run a bolt and I may end up doing that but wanted to see what my options are. Thanks.

View attachment 1715702627
Author: admin