Are c4 smart energy drinks just gone irl?

As the title says, I can only seem to find them online. My favorite energy drink (Mountain Dew Rise) was discontinued last year, and C4 smart became my new go-to, but now I just cannot find it in any of it's usual stores. Anyone else having this issue, and anyone have suggestions on similar drinks? Don't really want to try regular c4 because pre-workout stuff gives me horrible anxiety.