I have the table supports at home. We just re-discovered them after several years. ;-) As you imagined, they are wire rods (about 1/4" in diameter) bent into a "U" shape. The top of the "U" has a short section that is bent outward at 90 degrees to allow it to hang from holes drilled in the aluminum table support tubes. If you want to make up a set, I can measure mine to give you the dimensions. To be certain that they will actually fit the dimensions of your table and support tubes, I'd recommend making a mockup using light-weight coat-hanger wire or something similar before commiting to have them made up in stainless steel
