jcash, I'd suggest contacting BBV to see about a repair. I do not believe the doors are interchangeable actually. So a new door might not be your answer.
I believe Ms. Kitty speaks the truth (always).
My conversations with BBV indicate that the units are milled as one, and each piece is specifically mated to/for its counterpart. That's not to say that I cannot work, because it can. In my case, it actually
does work (between my two anodized BB's, but not if I try with the raw one).
Ultimately I'd be surprised if they'd sell just a door, since they can't guarantee it will work. But I would definitely ask them, because things might well have changed since this particular conversation I had with them. The fact that my two are interchangeable, and were created more than a year away from each other, indicates that this is a distinct possibility.
So, long story short, send them a note. It might be worth it.