I was lucky enough to get a number of Italeri French Artillery kits . They a very well done but have yet to reach the painting table. These guns are crewed by guard horse artillery (a couple of over-dramatic poses) that are beautifully executed. Will post when painted.
Another source is the prolific Armies in Plastic. While I really like their Rogers Rangers/Woodland Indian sets, their Napoleonic poses look a bit wooden. That said, they are in production and reasonably priced.