Several years ago there was a Pseudotropheus demasoni " Mozambique " around the hobby.
If I remember correctly it's easily distinguished from the original type locality at Pombo Rocks by having more numerous and much slimmer barring.
IMHO, the most important thing to remember when picking up Chindongo demasoni "Pombo Rocks" is to be sure that both the parents and the offspring have the same amount of solid barring on them.
Split or broken bars are a genetic clue of poor quality stock most likely from numerous generational inbreeding.