No there is self rising cake flour in a box at the store. I just can't remember the brand name. There are 3 brands on the shelf, if I recall.
You can make any flour self-rising by adding salt and leavener. Though not sure why you'd want to but some manufacturer did.
But I yet another baking "adventure" the day I used that and didn't notice ....
Now I order from King Arthur.
edited to add that Google revealed that Swans Down discontinued self-rising cake flour a few years ago. That may be what I used.