Your quest will be hung up finding hooks like those you show.
https://store.do-itmolds.com/VMC-7320-Heavy-Extended-Locking-Bend-EWGbrBlack-Nickel-1000_p_1212.htmlMight be to heavy but the length is what you want.
the little keeper that looks like the number 8. Its on his pic of the mold or do those hooks come setup for the swing heads?