Pat,
 
I think the picture that you are looking for is in the Photos section of the forum, not the Files section.  Look in the folder called "Bonding System - Bilge Ground Strap"  and you will find the pictures that Judy Rouse uploaded years ago including the one with the dimensions.  Here is a direct link to that album:  https://amelyachtowners.groups.io/g/main/album?id=84439 

Make sure you have some long extensions and a 30mm socket to undo the top nut on the keel bolt that secure the strap. 

I made my replacement strap from a 2" wide x 1/8" thick x 48" long piece of copper.  You can get the copper at www.onlinemetals.com or www.speedymetals.com.

Mark

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Mark McGovern
SM #440 Cara
Deale, MD USA