Hi Stephen,
If I understand your post correctly, you want to scratch build a static model of a sailing man-o'war of the larger sort, i.e. a ship of the line from the 1700's (which, given your mention of the Victory, I suppose might inlcude the Napoleonic Wars era).
This would of course a pretty ambititious build, and I sincerely hope that lockdown will be but a long-past memory by the time you finish it, but there's nothing inherently impossible about it; where there's a will, there's a way.
Firstly, as most of the people (active) on this forum tend to be more interested in (a) more recent prototypes, and (b) the r/c side of the hobby, I suspect it might be worth your while for you to check out an American forum, called Model Ship World (see **LINK**) which, I believe, has a centre of interests much more in the direction you are looking at.
Then a quick search of the list of plans published by Brown, Son & Ferguson in Glasgow threw up a set of Harold A. Underhill plans for a c. 1813 74-gun two-decker (see **LINK**). Please note that the link is only to the first of a total of seven plans, so at £10 per plan, it is not exactly inexpensive stuff. On the other hand, it is a set of Underhill plans, and there were few better than Harold A. Underhill when it comes to plans (and he was a top-notch model builder, too), so likely to be worth the money if you want an ambitious build.
For even more money, there are also a number of publications available from SeaWatch Books in the US, that provide not only plans but also very detailed build descriptions by contemporary masters of this type of build, see **LINK**.
Finally, another possible source of plans is the Brunel Institute at the S/S Great Britain Museum in Bristol. They hold the David McGregor collection of more than 7,000 plans, a list of which is available on their website (see **LINK**). For a fee, they are happy and willing to provide scanned copies of most of those plans (exceptions may apply for very fragile material).
Good luck with your build,
Mattias
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