Unfortunately, you can't buy many versions of Sans plush yet. You won't find cross Sans plush, dream Sans plush, or dust Sans plush. In addition, no one has designed a horror Sans plush or an ink Sans plush from fan art or games. However, you'll find these four variations of Sans plush: • Undertale Nightmare Sans Plush • Undertale Error Sans Plush • Underfell Fresh Sans Plush • Underfell Sans Plush Worst-case scenario, you can reach out to custom designers on Etsy or other plush designer stores. At the same time, you wait for fans to add more versions of Sans plush to regular stores.