Just a thought to help new South African DIYers to source good quality concentrates at reasonable prices with excellent delivery times. Below are two sites that I always get my orders filled and am happy with the product lines they have, ie: flavorah, CAP, and many others.
I have been doing DIY since the beginning of 2017 and am still finding new things to learn and new sites to order from. I have also tried one or two other sites and found their concentrates to be very chemical and ended up throwing the concentrates down the drain.
Please feel free to add to this list and I hope I have helped someone out eventually.