They are a very common clown in the wild, but they are terrible shippers and are very prone to coming down with brookynella. Most collectors/wholesalers don't deal with them because they are so delicate, but you can sometimes get them on a special order or if your LFS tranships.
They have been bred but the babies as smaller than most clowns and tend to be very difficult to raise to sellable size.
I have seen a couple cases where they lose most of their color in captivity. I have one that may be the ugliest clown in history.