It might be a fun project to write one's own. Here's some notes I made some time back on a projected Napoleonic version of "Necromunda":
Pistol: STR 3, 6"/- close, 12"/-1 long, 1 turn to reload; a figure can carry 2 pistols
Blunderbuss: STR 3, 12"/- close, no long, 1 turn reload; 1" template, disregard cover
Carbine: STR 3, 6"/- close, 18"/-1 long, 1 turn reload; if sling used, can be dropped and sabre readied automatically
Musket: STR 4, 12"/- close, 24"/-1 long, 1 turn reload; can affix Bayonet
Rifle: STR 4, 12"/+1 close, 32"/- long, 2 turns reload for rifled shot, 1 turn for musket(as above); can affix Bayonet
Sabre: STR as User, can Parry
Bayonet: STR as User, Long weapon (see below)
Lance: STR as User, Long weapon (see below), doesn't parry
Cuirass: 6 save, -1 M
Horse: M8; a rider counts as +1 T versus shooting or when in melee with infantry
Reloading: Can move but no charge or run; if mounted cannot move and reload.
Rifle Reloading: A rifle can be reloaded with a tight-fitting rifled round (takes 2 turns), or a loose-fitting ball that has the same ballistic characteristics as a musket shot (takes 1 turn).
Long weapon: A figure armed with a longer weapon than opponent counts as being Uphill (+1 to combat score); if actually uphill the figure doesn't count the bonus twice, but a downhill fighter with a longer weapon would cancel out the uphill bonus. Bayonets and lances are longer than sabres, cudgels, etc.; a lance also counts as longer than a bayonet if the lance-armed figure charged, but not if charged or in a continuing melee.
Pinning: Unlike modern arms, there is no immediate threat from a blackpowder firearm that has just narrowly missed the target; therefore blackpowder firearms do not cause pinning.
Bottle Check: Roll 3 dice and discard highest if 75% or more of unit is in close order.
Rules are the easy part, designing a fun and fair campaign with a mix of scenarios, etc. is the challenge. But something in the Peninsula should work – French and French allies, Spanish (both pro- and anti-French), British, and Deserter warbands scrapping in the hills for glory, gold, promotion, and revenge (as the case may be). Escort The General, Rescue the Captives, Grab the Payroll, Destroy the Bridge, Escape the Ambush – just some scenario ideas.
"The Silver Bayonet" has figure count in your range and character advancement, but the horror/monster hunting theme may not be to the true grognard's taste.
takes a look at flexible roads made from long-lasting flexible resin.
