Importing to South Africa is not that expensive. Take the price from the shop minus 19% German VAT, then plus 9% customs duty and that of your VAT (you should be 15% if I'm not mistaken). So the cost is ~ 5% higher. The shipping costs are around 50 €.
The best way to save money is to manufacture the housing parts yourself, which saves the product and shipping costs.
You will only find the PCB here in the shop because it is specially manufactured, the other components are partially coordinated with each other; but basically you can also buy them locally from you.