I have measured the thickness of the wire folding stand, and it is 1.2mm thick.
As it happens, I happen to have stainless steel dental wire (used for making dental appliances) that is 1.2mm thick. It is quite easy to buy several meters on ebay for just a few bucks from Chinese sellers.
So I just need to figure out how to bend the two spring coils in a perfectly round 1.2-revolution coil. Then, simply bend the two right angles so that it’s 59.5mm wide and 27.25mm tall (from center of coil), and voila, I have a stand.
I guess I can use a round dowel (wood or metal) to bend the coil. It would probably be 2.75mm in diameter. Bending the coils should be easier if I let the ends be longer, then cut them down after the coils are bent. I’ll use a Dremel to cut them since stainless is quite hard and will ruin my diagonal cutters.