The ban was a result of the Chinese distributor of the weasel hair failing to be compliant with some sort of regulation. The ban was supposed to be indefinite, requiring the Chinese company to show compliance. It wasn't necessarily that they were doing anything wrong to the weasels, just that they couldn't prove they were doing the right thing via navigating the red tape of international trade agreements and animal rights. In a few words: bad paperwork. That being said, I haven't check DB lately but last I remember he had the off sizes in but never the size 2 and below.
Pk-Pro almost always has them in stock for delivery. They're a German company, but delivery is quick and customer service is top notch.
Ill still be trying out a Kolinsky Tajmyr from Scale75 soon.