Generally we can give you some direction when doing pattern searches, but this is such a unique object with (seemingly) very strict guidelines for what it should and should not look like that it makes it difficult for us to point you to links that actually fit the bill.
That's why I suggested doing your own search--or at the very least maybe you could describe in more detail exactly what you're looking for and how it differs from the patterns already posted. For example, what do you mean by "simpler," as this pattern looks pretty basic to me? Do you mean you want one that's worked flat . . . . or what?
I confess to being completely ignorant about these types of hats; therefore, the links in the original posts seem "good enough to me."
They obviously don't work for you, though, so what more do you want in a pattern to make the hat authentic . . . and doable?