None is this is necessary anymore. Just call up BA in South Africa on +27 10 344 0130, option 4, and give them your routing. They are very quick, courteous, and knowledgeable. Just a short time ago I bought an ex-MPM DONE5 from them, with the first segment on QR, using a non-Moçambique credit card without any problems or complications. It's all very simple and direct. You should now be able to buy any rtw, starting anywhere, quoted in any currency, directly from any oneworld carrier anywhere with conversion to the currency of the location where you are buying the ticket at the bank interchange rate. No market restrictions! You could even use the AA rtw desk in the USA.