half-x hinge

Hello people, I would like to share with you the success of repairing the sunglasses Half-X. I bought these sunglasses on eBay for $100 for repair. The frame was great except for a broken string hinge. I was inspired here at the forum when I saw a post as someone reapaired the string hinge by...

So I was playing with my Half X temple while I was waiting for a reservation and ended up pulling the entire arm off. It appears that the rectangular piece has a smaller circle piece that is at the end of it that the hex screw tightens to and that snapped off. Any idea how I can get it fixed?