I have a set of Singular Motorsports version 1 hood louvers for the NA Miata (I think they're the same ones as NB, but am not sure). I went to install these in a new hood and the template I used was for version 2 louvers which are longer so I had to buy those.
Included are the 3 vents, precut rubber trim, and brand new rivets that were sent with my new ones. Everything you need but the template and the tools.
Asking $100 shipped. Pretty firm on the price. A vinyl template can be purchased from Ryan at Goodwin Racing/Singular Motorsports.