Dubro makes something similar to these and they are awesome. But in this case I needed more surface area, so I fabricated these real quick. The idea is more surface area, to distribute the load and for glue surface. I made the linkage specifically for Dubro Safety Lock Kwik-Links, but it should work fine with any medium size linkages.
You'll need some M3 x 40mm screws, matching nuts and some glue. I use quick drying tacky glue branded Quick Grip; it's very similar the kind of glue that is included in most EPO plane kits.
Specifically made for a Volantex Ranger EX but applies well to any foam plane.
Print this on 100%, medium.