Maranatha suggests contacting the group desk from the below contacts and negotiating a rate with the airlines. The advantage to this is that you will be asked to put down a deposit vs paying for the tickets up front and then you have some flexibility with name changes, etc.
South African Airlines
http://ww2.flysaa.com/
800-722-9675
groupsusa@flysaa.com
Delta
http://www.delta.com
800-337-4777 group sales
LAM (local Mozambique airline can be an option from JNB to Beira or Maputo)
http://www.lam.co.mz/en
There are also travel agents that can be helpful.
Airfare Planet: 888-204-8869, www.airfareplanet.com
Economy Travel 888-222-2110, http://www.economytravel.com/
Ellen Butler (503) 879-5005, ellen@butlertravel.com
