Boppy cover

Has anyone made one?
I did. It fit perfect but then it tore because I sewed the edges directly next to cutting them.. So the stitches fell off..

Could I crochet a straight thing and have it fit the curved pillow?

I can't see why that wouldn't work.

I have made several.
If you were to crochet something you would need to make it wider and longer than you'd expect.