Really nice!
Had I continued with my Mexican Adventure project (just sold the whole lot), I would have used the Perry Triple Alliance figures as proxies, too; might have needed a bit of sorting through packs, but there were a lot of options amongst them for Republican infantry especially, which is not well served in 28mm.
The Franco-Prussian range definitely a great bonus to forces.
Foundry have a decent sized range but obviously compared to some newer ranges like Gringo they look like a cadet force scale-wise. It's a shame Gringo40s never really expanded the range as they were lovely figures, but never complete enough to put together full forces, again particularly on the Republican side.