I'm fairly new to the world of basenjis. My boy is 3. So this may not mean a thing but I've never heard of 'wild basenjis'. Everything I've read and heard says that they have never been wild and have always been domestic/family/village dogs.
My sister-in-law and her parents lived in Africa for quite a few years when she was growing up.(Tanzania and Kenya) They said that there were many wild, mongrel-type dogs that had basenji features in their vicinity.