Warlord Games is expanding their French line with new Line Infantry. Seems an appropriate way to go about things.
From the release:
We’re delighted to be releasing our latest plastic set for our growing Napoleonic range – French Line Infantry. Wearing uniforms from the French age of glory – the all but unstoppable core of the mighty French Army that swept across Europe, the French Line Infantry are here in all their glory.
Featuring French Line Infantry in uniforms this set is ideal for battles from 1806 right through to 1814 (as the uniform persisted until that point despite a new design being introduced in 1812).