You don't. Ritz is a brand name. You can buy them at the grocery store, tho.
If I knew that, I wouldn't have been buying them all my life. One of my favorite snacks. Though they were better when I was a kid. Richer flavor and in wax paper instead of indestructable plastic. But I still love em.
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them