Oddly enough, there is another person in Spain needing to rehome their Basenji puppy. The fellow's girlfriend does not like dogs. The topic is "Basenji puppy for adoption (Spain)" and the guy is @Luc21. Hope you can contact him.
Even though breeders don't show on the on-line database, I do keep pretty full records, and by the way - please keep chasing people to send me litter data !
My gut feeling is if you can't find a dog who is utterly good with cats already, your best and safest bet is a puppy. I suggest you get on a couple of breeder's list and wait for the perfect pup for your house.