Great news all! A mod called Pirates of the Pacific_The Protection of the Elder Scroll by LordKarnak (http://www.nexusmods.com/skyrim/mods/29443/?) has what you are looking for. Whilst being a quest/player home mod it comes with three types of clothing which almost identical to uniforms of British soldiers during the napoleonic wars. To get them you need to follow the quest along until you are fighting an Imperial ship where the soldiers who you are fighting are wearing these armours (this will take less than 10 minutes). You can simply loot the corpses and wear the uniforms.
(Skip to 6:10 and you can see the fight on the Imperial ship and the uniforms). I hope that this was helpful!