Found it on -50% sale on a new (for me) site called 2Game, which I got to from IsThereAnyDeal? Looks like they’re authorised resellers, and I could use the small balance in my PayPal wallet to pay for it, so no need for credit card numbers into an unknown site.
If you add the coupon code GLHF10 on checkout, you get an additional 10% off, so I paid $27 (~R415) for it.
Note that I had an initial issue getting my code to show - kept telling me key wasn’t valid in my country, which is clearly wrong. My support ticket was answered within an hour overnight, and the issue was resolved - key received and activated no problem. It has to still be confirmed, but I believe the reason I had a problem was because I registered my 2Game account using my Twitter account, and this didn’t insert a country into my Account Information screen. I sorted that out this morning by doing a forgot password request and creating an email and password login instead of using Twitter, which then allowed me to insert my country. If you do create an account there, maybe use an email address to register from the get go, and then go into the account settings and add your country before ordering.