So sorry to hear about the loss of your girl. Worst part of owning a pet.
As Tanza mentioned, Beverly has had a family member pass. She is also not actively breeding, and her remaining dogs are older than you're looking for. That said, she probably would like to hear from you.
You might want to contact Lori Stargell at SkyHi Basenjis. She has had a few of Beverly's dogs so you have a connection. No idea whether she's looking to place a retired girl but she's a good person and may know of another breeder who is.