If this is the person I think you're talking about (at least they're
located your way), they did make this cross. When I were offered the
opportunity to get real praecox they jumped at the chance and sent the
crosses out to a pond to live until winter hit. A condition of sale
was the crosses would be destroyed. But they are also a commercial
establishment, although they do belong to a local aquarium society.
This leads to the old problem of paying the bills and a rationalizing
away the ethics in fish keeping. Granted you're still much better off
getting your fish from a breeder you know and trust rather than an
auction.
Cary Hostrawser
Minnesota Aquarium Society
http://www.mn-aquarium.org/
Rainbowfish Study Group of North America
http://home.earthlink.net/~sbuckel/index.html