I am restoring my 1975 Premier kit to pass onto my grandson, but I have lost some of the tension rods over the years. The rods are T-shaped and measure 3" from the collar to the end of the threads. The theads measure 1.25" in length. I am needing 13 of them, but would be willing to buy all 20 if possible. If anyone out there has these for sale, or would know where I might be able to find them, I would appreciate your help. Thx...