Here's what I did to my '04 visor's.
I went to JoAnn Fabric & bought some black leather material to match my black visors.
Made & Cut out a cardboard template covering the warning section.
Bought waxed shoe laces for my border.
Ran an ad in the classifieds & would pay anyone who sent me their rear 350Z badge for $10 shipped.
Cut very thin stirps of double sided clear tape & taped on the back side of the Z logo & attached to the center of the leather section. (I did not want to use super glue) Cut off the ends of the shoe laces, & ran them under cold water, placed shoe lace around the edges of the cardboard template & left them set for a couple of days....once firm, glued the laces around the edges of the leather section.
Some guys made a thick stitched Z logo but I wanted a OEM Z style on mine.