Dimensions are 2" high, 1 1/4" wide, and 5/8" deep, though it might be a little taller as some of the top got crunched.
I'm also wondering how I attach it to the little rope inside the metal spring bar housing.
Basically, there's a spring inside a 3-sided long metal box, and it connects to a pulley that has a set of little ropes leading to a metal clip-- it isn't clear how I get the clip into the metal bar at the top of the pivot shoe.
Thanks to your awesome website and videos, I've identified the long metal box as a channel balance marked 43D
