If you are looking for all four series of the Animal Crossing Amiibo Cards, then Amazon currently have packs available. The cards will be compatible with the upcoming Animal Cross: New Horizons videogame on the Nintendo Switch. If you are interested, you can purchase the bundle with the following links:
The Animal Crossing Amiibo Cards are also compatible with Animal Crossing: Happy Home Designer, Animal Crossing Amiibo Festival and Animal Crossing: New Leaf Welcome Amiibo.
Animal Cross: New Horizons is coming out on March 20, 2020, in the U.S. region.