Over at HPS, they have two expansion packs and extra maps which can be downloaded for free.
The Campaign 1776 Expansion Pack 1 includes a new campaign covering the full Saratoga campaign from the opening face-off at Fort Ticonderoga through the battles of Hubardton and Bennington to the Saratoga battlefield. In addition, it links in the "sister" campaign starting at Fort Stanwix to determine if Burgoyne's grand strategy for conquering the colonies could succeed. Created by Andrew Wagenhoffer.
The Campaign 1776 Expansion Pack 2 Contains additional maps & scenarios (see notes.txt for additional information). By Rich Hamilton.
1776 Campaign Maps show the location of each scenario in the game.
You can find the downloads here:
http://www.hpssims.com/Pages/FreeFiles/l...les%201776