dimensions of line that holds the centerboard down?

Thread starter #1
I got out on my new to me 14.2 mod 1 yesterday (finally!) and realized that something must hold the centerboard down as it kept kicking up. I found a shred of line attached to the transom and saw some pics - figured that was what is missing. There was barely any wind so it didn't make too much of difference.

Does anyone know where I can find the dimensions of this line so I can make a new one? I couldn't find it on Catalina Direct. I assume it is a shackle that attaches it to the centerboard?