There are a few metals around, 20mm so on the small side,dixon are 18mm and way too small , some of the metals have stens , that never made it to the desert, the best is a wargames foundry figure, but they only do one pose ! some of the other metals are quite good, one with a vickers k being the pick.
I think this a brilliant idea as I think the Streltsi have run their course now. Obviously difficult to do dedicated sets as everybody will want different stuff but if you are buying for a particular era then if all the sets contained a civilian from that era it's bound to be useful. Probably a bit ambitious but what would really be wonderful is a little tableaux like a blacksmith working at the anvil or a women weaving or grinding grain.