There is also the ALA (American Live Bearer Assn)
There are breeders all round the country where you might find rare and hard to find species.
I believe they are having a convention next month in Kalamazoo Mich
I have been able to acquire some very interesting species thru ALA members.
left Zoogoneticus tequila, middle Xenatoca eiseni, right Poecilia latipinna