Recent poll at BoLS clearly showed, that currently the most anticipated WFB army are Chaos Dwarves. In fact, this result of voting was rather easy to predict (similarly to Adeptus Mechanicus for WH40K). So, appearance of an alternative for official models for these armies was a question of time. Not so long ago, it partly happen for AdMech thanks to Micro Art Studio and their Iron Brotherhood. Now, the Moscals from Scibor Monstrous Miniatures pretend to fill a hole in Chaos Dwarves offer. At the moment, you can only buy a chief and three bosses, but the Greens section is showing additional bunch of pre-production sculpts and some nice skeches of planned models.
Moreover, they prepared some dedicated square bases for these little bastards. They fit nicely into a depraved dwarves theme, but are quite expensive (like all other thematic Scibor's bases).
Personally, I like the whole idea a lot and I'm looking for quick expansion of this product line.