Try locating a breeder through your area kennel club. Having said that, Basenjis are NOT hypo-allergenic. In fact, a leading cause for them being surrendered to rescue is allergies.
Also, what a breeder might not tell yoi (some are interested only in sales) is that basenjis demand a huge amount of attention, and if they don't get it they find their own entertsinment. They don't do well when left alone, so it's wise to keep two, and while they're beautiful dogs if their looks are the chief reason you're interested you should really do more research! They can be really frustrating dogs to own!
Good luck