Not to be harsh, but the fish should either be kept by you or culled.
They should not be distributed as anything other than hybrid fry. Whole populations of stock within the community have been ruined by hybrids being passed off as something that they are not. For instance, many LFSs on the east coast are selling hybrids as Aristochromis chrystii. Another example is the Champsochromis spilorhynchus. Probably 90% of the time you see this uncommon fish, it is not pure.
This is very easy to prevent, but has potential to really do damage to the hobby for folks interested in keeping and breeding a certain fish. It's very frustrating as a hobbyist to buy a group of 1.5" fish, grow them out and find out that they are not what was represented when you purchased them six months ago. What do you do then? You had intended on breeding them, but now what? You've invested a significant chunk time and money for a group of 10 $10-$15 fish, only to find out that they are not the real thing.
For certain fish, like same-species mbuna from different collection points, it will be nearly impossible to tell the difference. Local fish stores will not be able to tell if you were to sell them the fry or trade the fry in for credit. It is the breeder's responsibility to do the responsible thing.
Not trying to lecture you, just putting it out there.