No they dont have to be exact. Just preferably similar, or as close as I can get. I have gone through every catalogue and web site that I can think of and either theres not much there or else I am just looking past them. Closest thing I found was in Haggens. Cant think of exactly what model it was, I will look it up in the morning, but it was similar in shape But had 3 or 4 holes on the end for different tie possitions I believe, or for attaching beads, cant remember which.