Which figures are you refering to in your original post Nick? Igor Karpov has sculpted two lines of Chechen Wars figures. One which as Dags says was earlier than his work with Lead Adventure, and then two sets over the last year or so with Tiny Terrain Models.
The Ratnik line is the one I linked initially. They have larger proprtions, besides being downright fat, and wouldn't tend to be suitable for 28mm wargaming unless you're using lines like The Assault Group, and even then, they're more like out of shape soldiers at best (which I wouldn't rule out as their intention).
The newer stuff from the Chechen Wars Kickstarters are more realistic, though still tend to be a bit off compared to say Paul Hick's work for Empress or Under Fire Miniatures. They'd work with the Lead Adventure Post Apocalyptic range (there's a thread in the PA board showing off the Warbanner: Modern Ukrainians with that range), although the guns are smaller. Those are available on Tiny Terrain Model's website (at least the first Kickstarter is, the second may not be up yet as its just been fulfilled).
If it is the Ratnik figures you want then they appear to be available here:
http://toyarmies.com/catalog/11