where to find dragonfruit / cactus redbull in US

I was wondering if you guys knew any decent sites to order this particular flavor in bulk and have it imported, its discontinued in the US. Or, im in the southwest missouri area if anyone nearby happens to have some on them..? I don't know anything about sourcing this and havent done much research. I just know my sister loves this flavor and was sad it was discontinued and really wants some for her birthday/xmas/wedding this winter. She keeps trying to buy them off sketchy websites and is getting scammed so if anyone can help out let me know!