Thanks. Good pointers.

I do have a whole rack in a garage kind of like it, but I was hoping I could get something nicer and painted like in the article, ideally with different length elements, so I could make custom furniture from them, and then just cut MDF boards to size or something.

Good luck on your project! Btw, a lot of these racks come with plastic feet. You could cut shorter lengths from the bottom using an angle grinder or saw rated for metal, then hide the rough ends with the feet.

Actually, I don't know if those are really plastic feet, or if they're just added to prevent metal from poking holes in the cardboard box during shipping.