Thanks a lot, that is exactly same fish I saw in my petshop ! They ordered some for me to investigate quality! It is distributed by Czech fantasy . There is also one more dark specimen like one in your picture set!
Last info I got from Deutschland is that one day Ralf Paul sold some fishes to a czech breeder! I know also they talked about " Red shoulder" from Edward lake in Russia some years ago!
What will be the best, is to find for a scientist reference, to help us, to be sure we can consider this as minor fish!