Hey Lady Barbossa,
Sounds like you want to make your own Barbossa hat but if you want to save yourself the trouble we make a pretty close replica. 6"+ brim, it is flat with just the slightest curve towards the front, not a dramatic curve like some of the other Barbossa hats out there. We use the same pictures you've posted to get all the right nicks & cuts (though if you watch closely you can see from the movies, Barbossa has a few different hats with different placement of nicks, cuts & slashes). I won't say ours is 100% exact but it's close. Here are a couple of shots of folks wearing our Barbossa inspired hat:
IronBess:
And another you'll see at PyrateCon:
PM me if it's something you might be interested in.