Around 20 years ago, Ulf Debbeler sold a very nice range of figures, all conversions from existing figures, sculpted over. He had a big range of WW1 figures with colonials, many exotic ACW figures and also a range of the Franco Prussian war.
My hobbymate Pay once sent me these photos of such figures (infantry) together with conversion for Prussian artillery and cavalry for both sides.
If you are interested in what was available, I have photos of Ulf's complete range.