Black powder skirmish rules?

Hi, I’m looking for a set of skirmish suitable for pretty much any kind of black powder setting. I’ve found a lot that are “skirmish” games, but are typically designed for 30+ miniatures each side. I’m aiming for something considerably smaller (like the 10-20 per side range), with each model being an individual rather than part of a unit, so I can get some miniatures done quickly and introduce friends to some more fast paced gameplay. I know it might be a tall ask, but any suggestions?