We’re still trying to get/find some.
We’re about to drive around looking for workers building block walls 😱
It’s called a Masonary Reinforcement Ladder in Menards.
The 6”X10’ works best, but the 8”X10’ works too. I used that for the vigorous melon vines.
It is lightweight (little bit flimsy IMO), but it bend easily. You can connect the ladders with zip ties to make the structure taller.
The 8” is common in building stores and will work.