What do your hours consist of?
Zambia is good for twin IFR time
Botswana is good for VFR & eventually single engine turbine.
Namibia is good for VFR single and twins.
Tanzania is always looking for 208 pilots, I beleive you may need a type rating on arrival.
PNG is good for IFR, mix of turbines and twins.
for any of the Africa jobs the best time to come looking is between Nov - Feb.
You can turn it into a little holiday by seeing the Southern African countries whilst you decide where your best option to set up shop is.
It sounds expensive, but the reality is you would probably spend more in 3 months hunting for jobs in Australia (Africa is very cheap for food and accomodation).