I would also check out the local clubs, they will have all the common breeds you guys and gals are looking for and are very helpful. I met up with some cape town clubs when i was there for the Annual show, and they had a great variety and were happy to help out.
You dont have to be a member to buy chickens from them, they breed good/show stock, and very often have extra birds for sale.
Yup, I agree I think the annual show is the way to go,