I know the desire for Instax B&W film has been expressed here in the past. I just came across this 28 March 2017 press release http://www.fujifilmusa.com/press/news/display_news?newsID=881153 that announces the Instax Mini 9 camera AND Instax Mini Monochrome film. Availability (US and Canada) is given as April 2017.
The availability date in the press release is for the camera. The Instax Mini monochrome film has been available since last fall, and major retailers have it in stock now. I've already shot a pack, have several more on hand.
Agree with you, I was really excited when I bought the film, after the first two portraits.... everything was too dark and greenish, with no detail in the shadows at all. I thought it would be because I shot in a bar but then I tried shooting during the day and same results... I prefer the color actually.
PS: I took a look at your web eric, great material! I followed you on Flickr!