I have been putting together a set of napoleonic rules to play on my hex terrain. Here is a post that describes a game and gives access to downloads of both rules and an associated Quatre Bras scenario to go with them. I hope you see something there that interests you.
Link - http://battlefieldswarriors.blogspot.co.uk/2015/05/eagles-at-quatre-bras.html
Looks great! Good idea to use the blocks!