Yes, I made them myself. they are 3/16 stainless steel rod tig-welded to 1/4" s/s nuts. The inner nut is drilled through so the bolt only threads into the second one so it doesn't bind. They would not have to be stainless, I just had it on hand. At the top of the first picture you can see my sketch of my original idea. I was going to cut them from 1/8" aluminum with a jigsaw. They would not require any welding.