FWIW -- at HD (orange big box) one year, they had those sheets/panels in the back of garden section where they keep pallets of all purpose sand. It was tucked in between pallets and not easy to find. When I went during off season, the garden section was closed and they told me to look for the sheets of CRW panels in the last aisle beyond the lumber aisles where I would also find hardware cloth and cinder blocks.
Don't know if lowes follow the same logic.
I have to tell you that after considering making my own cages, I backed away from the idea. My reasoning was high budget, lack of help in making anything heavy duty, they way they take up a set amount of space in garden beds, difficulty in weeding inside, and realizing that I have to STORE those things during the winter somewhere somehow (I had hoped to flatten them for storage, but was told thus wasn't feasible).
I then considered cattle panel fences/walls which are sturdier, but they were too big to transport in/on my SUV.
So I have a few CRW panels that BIL got for me, and I use the biggest (4ft) cone shaped cages for the dwarfs (smaller ones for peppers and eggplants) but otherwise, I'm preferring stake and string using two 7 ft bamboo poles per plant, then tying jute strings between the stakes to support the side branches. Strings are wrapped twice around each stake in Florida weave, sandwiching the vines, and the vines are twisted around the strings or leaves are hooked on as they grow. (Last year Spiral Tomato Garden)
I buy a bundle of bamboo poles from AM Leonard's every few years. They last several years depending on application, and when they break down, I put them in the compost or just on the paths to step on and crunch until they are mulch.
I think if I'm back when I was only growing six or so tomatoes and had a lot of spending money, I might consider those Texas cages -- the kind that folds up for storage. They look kind of cool. Another idea I had before I found myself growing nearly 100 plants was to make my own square cages in two piece L shaped panels zip tied together.
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