A few metals included with the standard Perry plastic infantry, plus some sappers from Victrix Guard.
I've done these as four 36 strong units, but with the idea of splitting off the elite companies so I have six units of 24 if using units of 24 as a base unit. Elite companies were actually brigaded together a few times in 1809 as I understand it, though it wasn't common. That option will also help when it comes to signifying which Legere units are actually veteran too.
Here's the Voltigeurs.