Blackjack,
Just in case you don't have it here is the link to where that wrench is listed. About half way down the page on the left.
http://joesvcycle.com/page_5.htm
Ron
Jamo,
Are you sure that is real or is it a replica? I assume the rounded end of the handle is for you to put a long extension in to get more leverage isn't it.
But it does look simple enough to make one if you have the right tool.
Ron