Unfortunately there is no font I was told. I went on the same search few years back and I want to use it (personal reasons only, trust me) I saw this and thought I would finally reply for the next guy. What I was told, willing to buy the font and I still am; the words were written by someone who has never been disclosed. There are stories of page, plant, Jones, bonham, grant, a secretary in the studio, a guy off the street. Someone in the know told me someone was paid to make up the scripting and never reproduce it. It wasn't a we want the money thing otherwise they would make a killing off of it. John Paul Jones said that if anyone wants to write a cool letter for someone, they would learn how to cardiograph it themselves. Many have. Finally I did.