Fuji used to make all their B&W films in bulk rolls. You could certainly buy them through B&H. They never brought them into Australia so I used to buy from the guy in Japan (megaperls, now Japan Exposures ).
Anyway Fuji stopped making the B&W in bulk rolls over a year ago. I think they sold out pretty quickly after that. All you'll find now is old stock if you're lucky.
Hopefully, Freestyle will introduce their Legacy brand soon. Rumor has it that this is rebranded Fuji film. I would think it would be available in bulk rolls. Perhaps Fuji couldn't sell enough of their own in bulk, but could by rebranding it and selling at a lower cost.