IHi ;
I have come across some that may help . What scale is the model ? You should be able to fine some in the Sewing Section of Hobby Lobby . Now I didn't see any brass ones at my store , except the standard ones in the Dollhouse section . But ,You can , as " G " Suggests use brass wire .
Drill the right size hole and drop that wire right down in there . Sand the end and Viola , Shiny brass nails ! I have used brass wire for this more times than I can count . I find it easier And I can have different sizes of nails too ! T.B.