Both the Shipyard and WAK kits are great, as both are top-tier publishers. I don’t know of any currently published models that are specifically privateers from the 1812 period. WAK is bringing out a model of a Royal Navy combat brig from the Revolutionary era that could probably be re-worked into something close to your preference. There are also the smaller wargaming kits from Jeff Knudsen (War Artisan).
Wyvern
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