I have what looks like a pretty solid Orbat for Leipzig from the Nafziger Collection. I am calculating the divisions into our "standard" size battalions rather than trying to reproduce the wildly variable unit sizes present at the battle. the Divisional strengths will be right, there just might be fewer/more battalions than were present at the time. If anybody knows of significant flaws in this Orbat please post in the comments so I can correct the problem. I will be posting the Order of Battle a bit at a time as I build it up.
Next issue, rounding up enough people to make this work. People that are interested can contact me at firstname.lastname@example.org with the word "Leipzig" in the title. You will need to be available to come to a couple of games before the big game so as to learn the rules.