At www.twinmountainfence.com, you can order rigid fiberglass rods that wore out from being used on oilfield pump jacks, and they make great fenceposts for electric fencing. They last a long time and are fire resistant. The company also sells cotter pins and wire clips. Because of their availability, they are fairly inexpensive.
I will suppress my every urge. But not this shameless plug:
It's like binging on 7 seasons of your favorite netflix permaculture show