As I said, the fish were very easy to look after, and not really difficult to breed. The problem was they look kind of weird, i.e. white, with transparent opeculae and no eyes. Hobbyists didn't like them, and since they were of no use, their habitat was substantially destroyed.
Knowing where you live, (muhahahahahahah!!!!!), the Life Sciences Dept. at Reading University often have little projects where they delve out a few fish that they haven't room for to local aquarists to hold and look after, (or at least they did when I lived there). Most are not Red List species, (there are special licences you need and you have to accept there will be random inspections by all manner of interested bodies), but are still well worth taking part in, I was involved in dozens of other projects, but the geertsi was a particular coup as I was one of the few people they could find in the country that actively sought out African Barbs for breeding.
Keep an eye out for other projects, once you've got an "in" there, you'd be suprised what you can get involved in.
I see you keep mostly livebearers - there are several livebeareres that are extinct in the wild but kept alive by careful breeders. If you are a good breeder, i.e., not one that can just turn out dozens of fry, but one who can cross THIS male with THAT female and keep all of the records, i.e. the genetic makeup of your fish, then you could try for involvement there as well.