My B15 non-lsd transmission was delivered today. I was very surprised to find out it in fact is an lsd unit. I found it on
www.car-parts.com It even said in the post it was a non-lsd one. So I paid $540 delivered for a 2001 B15 lsd transmission with 51k miles on it.
If anyone else is looking for one, I would recommend finding one posted and go look at it in person. I have a feeling a lot of these salvage yards don't really know what they have.