There are none to fit a square butt "N" frame to be found anywhere, not even on the Lyman "mothership" website.
You're not the only one Alpo, they were ugly compared to wood. I thought they sucked.Maybe they've just been discontinued. The Presentation grip was the first of the Pachmyers, and was a fairly large grip. I've got Pachmyers on several of my guns, but none of them are the Presentation. I put a presentation on a Ruger Security Six back in the '80s, when they first came out. But that's the only set I've ever bought. Just about all my Pachmyers are Grippers. MUCH nicer grip.
Could be that I am not the only one that dislikes them, and they quit making them.