I stopped at my buddy's body shop and he asked me if I could find nose assemblies for this riveter. I sent photos to Byler Rivet and was told they are obsolete, but available for $1200 per size. I figured I would ask the experts here.
Don't know if it fit but check these eBay auctions. You might also check and I think Boeing still uses these fasteners as we had those pullers on the 747 and the 777 when I worked there
