That the boot would be on the sreader deson't make sense. The boot is placed around/over the spreader tip and secured to the end of the spreader tube by running a few layers of rigging tape around its end. It covers the spreader tip, which should been secured in the end of the sreader tube by a through bolt, with the upper shround passingthrough the tip. Makes no sense that the boot could be attached to the spreader and the shround not in the tip covered by the boot...I supose the cast alu tip part could crack, and the shroud rip through the plastic boot.
The part referenced at RigRite is the correct part.
Certified...in several regards...