I only know of them on Gardener's Supply on-line, haven't seen them locally.

We made our own square cages. Used "Remesh" panels from HomeDepot. They have large holes for getting your hand in. We painted the wire with rustoleum to stop the rust. It comes in large sheet. We bent it to form the square. Pretty reasonably priced at

Thanks for the suggestions; I won't waste my time looking for them locally.

I have some of those square cages, and they aren't a lot of good. Too short. Remesh is the best!

I love remesh! I don't think I've ever used it for its intended purpose, but I've used it for lots of other things.