For what it's worth, while sidetracked, the Townsends reenactor's coat looks to my eye a LOT like a more professionally-tailored version of a "capote" - a home-made winter coat they used to home-make from heavy wood trade blankets on the American frontier - all you'd need is a blanket, needle and thread, and a long, cold winter stuck in a log cabin with nothing else to do.
The tricorn seems to me a good fit for such a thing, any sort of wide-brimmed "cowyboy" style hat would too, as would the classic raccoon-skin cap, stocking caps, hoods, and the like.
I wouldn't at all be surprised to find that's what the Townsends' coat is modeled on, and probably a lot of the other coats we're looking at here, including the military coats.

Which sort of goes into American frontiersman/mountaineer territory, and I'm sure it would suit native American tribes as well, the sort of thing that might be most easily pinned down somewhere between the 1700s and 1800s - generally spanning the Wargames Atlantic Age of Reason, Napoleon's Wars, and Imperial Conquests lines. It seems the original trade blankets were imported from England in significant numbers beginning in the 1780s by the Hudson Bay trading company, and I'm sure they were practically an alternative to money for the fur traders, with a thousand-and-one uses besides blankets and coats.
It wouldn't look out of place in post-apocalyptic contexts either, I think.
I could get behind a frontiersman type set for any of those WA product lines for figures that are dressed in this sort of thing (along with buckskins and other appropriate costumes), but short of that, I guess that any Napoleonic, ACW, WWI, or other military kit with figures in greatcoats of any sort would be the next-best-thing.
Anyway, for the fancier, more nicely-tailored stuff that nobles might wear, I can't really think of much in plastic kits or in miniatures - I don't know a lot about what's available in white metal or 3D-printed minis these days, and I don't know a lot about Silver Bayonet, but that might be one place to look for something of this sort.