I've been researching some pirate stuff a came across this website called Briellecostumes and they claim to have historically accurate pirate costumes can you guy judge if there historical or not :
Sea Thieves - Pirate Clothes
CELTIC PUMPKIN: Pirate Costumes-An Introduction
Pirate Fashions - Authentic Clothing, Costumes N' Weapons fer Pirates, Wenches, Privateers N' Bucaneers
Pirate Clothing in the Golden Age of Piracy - World History Encyclopedia
Men's Plus Size Realistic Pirate Costume
Incredible Custom-Made Pirate Costumes from Jodi's Costumes
Pirate Costumes – Escapade
Pirate Woman Costume at Boston Costume
The Golden Age of Piracy – Costumes to the Period | By the Bodkin
Custom Made 17th Century Pirate Costume by Historical Fashion By Barbara Anne | CustomMade.com
Out of this period, but had no other place to put it yet. Interesting site on historical costumes | Pirate woman, Pirate art, Pirates
Pirate Captain's Frock Coat Historical Period Costume Coat - Etsy UK
Best Pirate Costumes Ever, Jack Sparrow Pirate Costume