Hey Don, I have a 37 Fordor. Can't find any single piece closed loop piece, so I order a generic piece from Joe's Antique. I cut it to length and it fit very well. I have seen recommendations to super glue the two ends pieces together. Have yet to do that, am letting is sit and normalize. Be sure to scrape out all the old crud before gluing in the new piece.
Can send you some pics and the p/n if you want.
gregg