Not sure what you mean by where did they come from. My first one came from a breeder in New York, and the second is a puppy that I kept when we bred my bitch.
Yes, Ridgebacks are great dogs, but they're definitely not for your average dog owner. They're a unique breed that require some specific "owner" requirements that most people don't have (i.e., their prey drive is so high that they can't be off lease in unsafe environments, etc.).
Yes I meant who was the breeder. Mine came from a breeder in Houston. He was from South Africa and brought his dogs from there. Mine were fine without a fence even living in the city until we had a death in the family. The dogs sensed a changed in us and became more and more protective of our property. When the post office stopped delivering our mail I had to get a fence. They were 2 of the best dogs I have ever owned.