Smaller shock bushings?

In the middle of an axle swap. Using Speedway lower shock mount/leaf spring plate.

The plate does not come with a shock stud. A coworker gave me some bolt in shock studs, but they appear to be 9/16 and the stock stud joints are 11/16.

I can't seem to find larger bolt in stud, or bushings with a smaller ID.

Anyone run into this? Any advice?