Well, I got some somewhere. I just assumed they were meant to be used as I did. I fit them to the ends of pieces of Atlas track I would cut to fit. Say I had a 40" straight section that I needed to shorten to a 28 inch piece. I would cut the piece, then cut and remove two ties off the end where I had made the cut, then fit one of these on the end. That gave me a 28-inch straight with tie clips on each end - almost as good as factory made. I would/could use the other end part of the duo on the remaining 12 inches to make that into a piece that would fit and clasp tightly, too. I bought about half a dozen or so once upon a time and do not recall seeing them since, but then I have not looked again, either.