Encyclopedia of Trade a Goods Volume I: Firearms of the Fur Trade shows 2 Dutch guns of the era that were collected in upstate NY. They are at the Museum of the Fur Trade in Nebraska. Also there are a good many early Dutch snaphaunce and flintlock gun parts that were dug at Ganagaro (Boughton Hill), a Seneca site near present day Rochester, NY.
Leonard Day has been making Dutch trade gun reproductions for some years. I think he originals normally had very long, say 54" barrels though. Those are not easy to come by, and the early lock castings can only be obtained from The Rifle Shoppe, if they have them.