You can get a domestic fox from the breeders in Russia, but they cost around 7000 dollars. Don't get one from anywhere else, though, since those would most likely be wild-caught foxes which would not make good pets.
It is illegal to catch foxes from the wild and sell them as pets. No reputable breeder does that. I got mine for 500 which is generally the price for non Russian foxes
You misunderstand, these are not wild animals. These non-wild color morphs are found in fully domesticated foxes. They are the result of a Russian breeding experiment originating in the Soviet era. They act like a cross between a cat and a dog.