Are you talking about the round bar that has a slot at one end and the other end has a bend and a cotter pin? I had one that was missing from my truck and could not find one so I got round bar from lowes and bent and welded and grinded one to match what I had on the other side.
I will try to get a pic of it off my phone to post for you so you can see what it looks like.
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EDIT here is a link to an exploded view and part number 3 is what I had to make along with fabbing a spring number 4.
http://chevy.oldcarmanualproject.com/military/1942/42cm4x2t0506.htm
