I don't know what they actually are called, but our LFS here a couple months back had a similar fish that you are talking about. It kind of has the shape of a Bolivian Ram, with the colors and pattern of a GBR, and finnage similar to an angelfish. Kind of like a Balloon Ram with fins like an angelfish. It was quite interesting looking. And they are said to only get to 3 inches max, just like the Bolivian.