Yup,

Zambia's another option, but as I've not hunted there my knowledge is more limited than the previously mentioned countries.

Some areas up there are fenced and some are true wilderness areas - If you're happy with a fenced area (I personally prefer TWAs) then Peter Bird/Balla Balla offer a good quality operation. I've not been to his Zambia camp but I do know it by reputation. I first came across Peter umpteen years ago when I hunted his SA area and can tell you he's also one of the "Good Guys" and 100% reliable.........

I believe the TWAs have good Buff hunting but Zambia is known for it's habit of changing the rules/quotas etc at short notice and for that reason I'd be more inclined to go elsewhere - but as I said, I've not hunted there so perhaps you'll get more detailed advice from someone who has.