Would also like to see the MK5 . As to it not being viable commercially strelets has covered some pretty obscure conflicts already . The Russo Turkish war with I think 12 sets springs to mind .2 sets for the Chaco war seems doable especially as they will be the only ones in the marketplace

The South American wars of independence might also be interesting. Would love a set of Bolivian line infantry in red! I don't think we'll ever see them, though as many other sets from similar time periods can be pressed into service here.

It may interest You:

http://pub19.bravenet.com/forum/static/show.php?usernum=1619281253&frmid=6&msgid=939936&cmd=show

I would certainly be interested...

this article gives some background info and may be useful as an overview for arms, the Vickers Archive also has a number of photos of guns intended for this conflict...

Bolivia vs Paraguay

Bolivian field guns

Would be interested in earlier south American conflicts too....