Apparently wild caught Congo/Zaire species only tend to be allowed to be exported from ther regions' countries at certain times of year, presumeably after spawning seaon is over, so its often the new youngsters that are ending up in fish stores.
According to Sam, the manager of Aquajardin, "Congo fish" are expected for the next few weeks. They received some Steaocranus tinantis last week, which look quite quirky ("Blockhead" meets something like a Giant Danio for basic shape), but they are one of the larger species (~15cm) and I always had my heart set on homing the lonely famale who has been around since last year (she was looking so unhappy with the catfish, either hiding or trying to swim up the back-left corner of the tank).