I tracked the source image back to here. I'm guessing either she made some stickers for herself or someone else did a one off printing for themselves. I can't find them for sale anywhere.
I do custom stickers and decals in South Dakota and by mail, I can do medium to large batches of them, but my equipment is way too big (68 inches) for one or two.
Another good one I've seen recently is the "no mercy for fascism" poster with a giant fist squeezing a nazi snake. I mean to fly that one against a fascist neighbor of mine who flies the Gadsden outside his appartment. That and any other super progressive/gay flags I can find.
For that matter if you search for snake anti-fascist images you'll find a lot of great historical and modern examples.