They dont usually live outside of their host corals, so I would doubt they are available readily. I had two in an stylophora, and one move to a pocillopora recently. When I try to get a picture, it is too hard, because he's way in there and the coral polyps cover it.
Dont be too enthralled, though. All of the great polyp extension I had in the core of the pocillopora is now gone, and the inner area is dying off due to his activity.