After some search, we eventually tracked down the algorithm to calculate the check sum for the SA ID number. Here is the java code for your download.
/sites/g/files/g1432011/f/201402/ZZ_SA_IDNumber.java
Here is the latest Chart Of Accounts (COA) for South Africa.
/sites/g/files/g1432011/f/201402/AccountingZA_070114.csv