Not a great idea to buy climbing shoes sight-unseen unless you have owned the exact same pair before. Besides, climbing shoes aren't significantly more expensive here in SA than in North America.
I recommend Evolv - they are sizes according to your street shoe size so you dont have to play the size guessing game. Evolv make 2 womens-specific shoes (narrower foot, lower ankle) - the Athena velcro and the Rockstar lace-up. The Rockstar got an Editors Choice award from both Climbing Magazine and Rock & Ice. You can find Evolv shoes at CityROCK in Cape Town, Drifters in Sandton, Hikers in Pretoria, or Camp & Outdoor in Durban. http://www.evolvesports.com/ROCKSTAR.htm