This isn't about who sells what, or where a ship is from, it's about the fact that certain factions would not be able to get ships from another faction or they would shoot it on sight and not bother with what ID it's broadcasting.
As far as I know there isn't a ship list for the Bs|.
I just wanted to know if there was an RP reason why one Bs| member had a ship from a hated faction, thats why I commented on it.