I don't have a pattern, but what I did was bought a hat in the general style and then put the L on it. It isn't exactly the same but it is very close.
Or, you could use this.
The letter on this particular one isn't very good, but that's not the hard part. I hope this helped.
EDIT: Didn't realize that this post was from so long ago, so I guess you've already figured it out XD