Exact dimensions for Wheelsmith Rim Rods? Does anyone have access to the Wheelsmith Rim Rod ERD measurement tool?

I need to reproduce this no longer manufactured tool.

Specifically, I need the length of the yellow portion of each rod, the diameter of the yellow portion of each rod, and the length and diameter of the alloy portion of the rod. Bonus points for the angle of the nipple seat at the join of the alloy portion and the yellow portion.

Can anyone help me?
Why bother? There's 5 sets on eBay right now:

Wheelsmith Rim Rods on eBay