I recently learned the BD-0 is exclusively distributed by Lighthound so don't expect to find it anywhere else for now. You might have already seen the SE-1 with their branding. Maybe they had success with that model so they decided to capitalize on their newest offering (at the time). This isn't good news for international folks.
UPDATE: Word is there's a head light in the works that should be available soon. Also, they're working on a design for 3 x AA/26650 but they won't start until the head light is finished. This will do a good job of rounding out their product line.
That's funny, now it looks like the entire post was made today when in fact only the updated portion was. I didn't realize it did that. The info about the BD-0 was posted a few days ago. I want the 3 x AA/26650 NOW!
