Neighboring countries are generally services by road and the import/export process is relatively simple, except in the case of Mozambique which requires quarantine for import and export.
Road freight into West Africa is available on the occasion albeit very seldom. All the cross boarder paperwork, health certificates, permits and custom documentations can be prepared by HEE in advance on your behalf.
Imports from African countries other than neighboring countries, are time consuming, costly and complex, but are completely possible.
It is possible to import from neighboring counties to South Africa on a permanent or temporary (for competition) basis.
There are frequent and fairly cost effective flight options into Nigeria and Kenya although fairly lengthy pre-export quarantine is required.