Can't say I've seen a counterfeit of the 056x. The counterfeiters tend to go for stuff they can potentially make more money on, like Striders, Hinderers, Shiros, etc. where it seems like you are getting a "steal" for buying one at $150-200 but you are getting a fake. A really good, scarily close to the real thing fake, but a fake. Meanwhile, the seller laughs all the way to the bank. Not enough profit margin in that sort of game on a knife that costs that in the market already.
On the other end of the spectrum, there are billions of fake Spydercos. It's almost terrifying how many fake Spydercos are out there, from all levels Spyderco makes.