Where can I find a FireCracker Cactus?

I love this cactus plant you showed on your Twitter Page. How do I go about Getting one?

Hi Tory,

bright orange tubular flowers on Firecracker Cactus — FireCracker Cactus

You can order seeds to grow a Firecracker Cactus. I’ve never done it myself so not sure how successful the germination is. The orange flowers are really different. Let me know how successful you are.