Help identify the shelf clips I need for this please

[Coyote556]

I have this surplus cabinet that has 7/16" square holes in it, apparently for shelf clips. I cannot seem to figure out what type of shelf clip fits this design. Does anyone know what fits it and where I could buy them?

 

[sselander]

Maybe these folks can help (they carry clips from different manufacturers)

Shelving Clips
http://www.shelf-clips.com/product-category/shelving-clips/