Thanks for that word of confidence JJ. I would say , try Maun. It sounds like Swamprat is the man to speak to there. Namibia is also a good bet. In Gabarone there is Kalaharie Air Services. Sorry , no contact numbers for you.
Rossair at the moment are not really taking in any 1900 co-pilots. They have to many as it is. Don't know about the Twotters though. If you have a DC 3 TP rating , your in. They are looking for pilots on that. Can't help you much more than that. If you want to call them : +2711 701 3500. Hope this helps