AWI clothing would be fine for lower class (and older middle class people) in the countryside. The closer you get to towns and the higher up you get in society, the more likely you are to have at least reasonably current styles (waistcoats stopping at the natural waistline, cut-back coats, tall hats with narrow brims).
For countryside folk don't forget the Sleepy Hollow figures in Westwind's Gothic horror range (Old Glory in the US).
Also look at British sailors for the Napoleonoic wars - if you are setting a game in London or near the sea there could be sailors nearby on a 'run ashore' (in best shore rig clothing and armed with good stout canes).