Does anyone know of a good supplier for green leather to use for a longbow grip
Great Northern, maybe...? I know they make quivers with green leather hoods.
Tomorrow on my ongoing Kanati thread I will post a pic of a green leather (horse hide) that Don at Eagles Flight used on my quiver. I've tracked it and it should be here when I get in from work. Perhaps he can assist you.
You might check Hobby Lobby or other craft stores or Tandy's.
Tandys has it and they will ship.