Capitan Games have released a smaller scale version of their Master & Commander Napoleonic navel rules called Master & Commander Frigates.
From their announcement:
Master & Commander Frigates is a new game based in our naval rules system. We have scaled down, and focused on the 4th, 5th, 6th and unrated ships of the combat navies of the finals of the XVIII century and Napoleonic Wars. Without changing any rule and with the new Ship Data Cards, you will refight the naval combat of the super-frigates and rasées, frigates,corvettes, sloops of war, and cutters. From oceanic patrols and convoy escorts to coastal actions. We are working in ships for the Royal Navy, Spain, France, Dutch and United States, they will be available for download in brief.