I wasted a lot of time online cruising the popular rescue sites, only to find out that:
• many of them are way off on the animals lineage,,
• there are a lot of people willing to take advantage of you, and
• most of the breeder websites are not up to date.
So, I switched tactics. I went local. Contact Veterinarians, the Kennel Club, dog trainers and groomers, etc.
Kennel Clubs are gold! They tend to be involved in local and/or regional dog shows, so they are probably the most likely to be able to connect you with a breeder. In fact, that's how I met the breeder of my girl. I attended a local show to see if any Basenji's were entered so that I could see one "in person". Lucky me! Doodle's breeder/owner was there showing her B's!
Veterinarians might have clients with Basenji's... they are worth a try. There is always the possibility that one of the local Vets are involved with the care of an expecting or whelping B.
Trainers and Groomers are least likely... but that's only my opinion. It doesn't mean that someone near you isn't calling around for a trainer that can teach their pup not to rip the corners off every pillow on the sofa.
Good luck with your search! Please keep us updated!