Interesting. Yea, I just checked the Steel Series website, and it's not listed there. I just check Amazon, and it's not listed there, either. So I guess it is an out-of-US product, like the Razer Krait 2013. Thanks for the FYI.
That said, viowastaken, you said you liked the shape of the Sensei better than the Kana. Have you felt fatigue with either mouse shape? Because I actually tried a Sensei for a bit, and I found the grip fatiguing, so I'm wondering if I tried the Kana, but it's worse than the Sensei, it might be even more fatiguing than the Sensei (for me, at least).