Andy Marshall can comment on this better than I, but there have been fairly regular surveys looking for this species for the past several years, which to my knowledge have yet to be successful.

No annual CITES export quotas for K. magomberae have been issued through 2013 (CITES 2013) and there is no reported trade in this species between 1977 and 2011 (2012 and 2013 trade data is incomplete or unavailable) (UNEP-WCMC 2013). This species is not known to be present in the captive market, although illegal trade and/or harvest may occur on occasion.

References:

Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). 2013. CITES Export Quotas. Available at: http://www.cites.org/eng/resources/quotas/index.php. (Accessed: 11 Aug 2013).
UNEP-WCMC. 2013. CITES Trade Database. Available at: http://www.unep-wcmc-apps.org/citestrade/expert_accord.cfm?CFID=50172297&CFTOKEN=72268891. (Accessed: 11 Aug 2013).