Single Rivet under cod piece.

[IronBronson]

I cant for some reason find to much info on this specific detail.

I already have the two punch rivets on the bottom butt plate that is bellow the cod. 

For the front bottom cod piece I see we need a single rivet there. 

Not sure where to find these single rivets or what size I need, or the dimension that they are supposed to be placed.

Any help would be amazing!

 

https://imgur.com/eniKLbm

[troopermaster]

The rivet in the cod piece is a brass split rivet with an M4 brass washer that holds a black elastic strap in place. The rivet has an 8mm head with 6mm legs.