I think we talked about yours once before...I had to make mine with some small machine screws that I sanded the heads on to get them to slide along but not turn. I threadlocked the nuts on and zipwheeled the protruding threads on the backside.
VeryTangled I remember reading about those aveco clips back then, thanks!Not too sure, see the following? https://www.fordbarn.com/forum/showthread.php?p=1602003