I'm afraid there's no plastic kit on the market that really comes close to looking like a British 32-gun frigate of 1808. (For that matter the one in the old Gregory Peck movie didn't. And as for the models used in the more recent Hornblower TV seried - forget 'em.) About the only one that comes close is the old, old Airfix HMS Shannon, which is about six inches long - and I'd have no idea where to find one.
One other faint possibility: Pyro used to make a small model of the USS Constellation. But that kit represents (not very well) the sloop-of-war built in the 1850s - not the frigate of 1797.
Then there's the old Lindberg French frigate La Flore, which has been reissued fairly recently under the nonsensical label "Jolly Roger." But it's pretty conspicuously French in a lot of ways.
The unfortunate truth is that plastic kit manufacturers have never made a serious effort to cover the subject of sailing ships at all comprehensively. The number of sailing ships that are represented by plastic kits is, compared to the potential subjects, miniscule.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.