nwaas.com

I have the potential to acquire a group of the above mentioned killifish.

I haven't been terribly successful in finding tons of information about it. Do any of you have any experience with this fish?

The same person has Xiphophorus nezahualcoyotl: Mountain Swordtail available.

Kevin

Extinct in the wild, fairly easy to keep South American peat spawner. Live foods and some frozen only. They can be kept in very small quarters with no decoration but a tub of peat for them to lay eggs in.
http://www.aquarticles.com/articles/breeding/Drew_Cynolebias_constanciae.html
The article will give you a bit more.
Michael