Advice on ‘74 Duster

Ok, the J hooks I had were long so long that the one on the drivers fender, the wing nut wouldn’t tighten it down as it ran out of thread. SO, I added a few washers and nuts to close the gap, at least for now my battery is secure and it isn’t going anywhere. Removed that stupid battery handle also now it has a much cleaner look.
Anyone know where to get the proper J hook for it?
Thanks