Karl: If there’s one thing that shows the shift in the accessibility of shamisen, I would say it’s now that the common person can actually order an azuma sawari. I mean, though difficult, it was still possible to get a shamisen. But only a year ago, it was almost impossible for most people outside of the shamisen world to get hardware. I’m pretty excited that this is possible, and the trend that it sets. 
And yes! If somebody gets a sawari-less shamisen on the cheap, now they can get one installed on their own! (Or even install it in some custom instrument)
Shinji: It depends on location. I believe it is illegal to import into the US. I’ll talk with Masahiro about that.