Please check out www.basenji.org which is the Basenji Club of America website. Under the tab About Basenjis, click on Breeder Referral and you can locate breeders by state. You will probably have to wait until Fall for a pup unless some breeders have leftover pups. Some breeders also have adults available.
I do not know how long it has been since you owned a Basenji but if you are getting a pup make sure the breeder is reputable and is doing health testing, especially the Fanconi DNA test. Most reputable breeders do eye and thyroid tests and hip x-rays.
Jennifer Hill