To chime in here, I think I bought a 10-hole sopilka from the same maker in late 2010/early 2011. I say "think" because I didn't buy it directly - I inquired about buying one with Yevshan Gifts (
http://www.yevshan.com), as they didn't have one listed in their catalogue at the time. They contacted a craftsman in the Ukraine who came back with a price list, and I bought a mid-level model made of pine (custom-made, apparently). I'm pretty sure it's the same maker, because it has the squared-off head like the alto model above which as I understand it is somewhat uncommon (although mine is a prima), and the fingering chart it came with does reference "Vinnica" in Ukrainian. Yevshan wasn't forthcoming with the maker's name/exact location, etc, but that's understandable if they feel they have a unique source of instruments and don't want others intruding on that.
I just searched Yevshan's site for "sopilka", and they now have a 10-hole chromatic model listed for CDN$145. As the OP said, the 10-hole models are hard to find outside Ukraine/Russia - I spent some time trying to find one online and couldn't, so if this is now a product they can reliably have made, this is a boon for enthusiasts. Their communication with me and the maker was very good, and it was delivered as promised.
I have no affiliation with Yevshan except as a happy customer.
Now, if I can only find the time to learn how to play it

(Side note: in my reading I found that the version with a fipple is technically known as a "dentsivka", whereas a proper "sopilka" is end-blown like a kaval. However, it appears in practice in the Ukraine most folk flutes are simply called "sopilkas".)