Irrational Number Line Games has released their scenario for the Battle of Puebla!
$1.99 USD gets you a brief history of the battle to set the stage, orders of battle for both sides, terrain layout map (including templates for the forts which you can print), stats for our WILS ruleset and designer's notes to port the game to other systems, and a set of print-and-play chits (in case you don't have the right minis).
We play this every year on (or about) the 5th of May, and a few extra times now and then.
While the Mexicans are likely to win most of the time, there are still interesting challenges for both sides that make replay engaging time after time.