They definitely are beautiful
There are a few more people starting to work with them now (and I keep trying to persuade more people!) so I hope they'll become more common. At the moment though any BEWs in my litters are going to club members to continue showing, developing and establishing them. They don't yet have a permanent standard for showing so getting the required three generations of whites is the current big goal.
Do keep an eye out in pet shops as Souff says. I've seen one in a shop and know of a few more being found in shops (they pop up sporadically in UK dom spot lines).