They were quite common in Milwaukee and Chicago a decade ago, and I would see them often in LFSs, but not lately.
Jeff from Aquaiticclarity has access to many West African cichlids not often seen, and I believe he was breeding them for a while (may still be).
Or you may want to put an want ad in the Greater Chicago Cichlid Assn site if interested gcca.net
And if you go to Apistogramma.com, under the title West African, you will find a discussion about them on page 7 (I believe)