This site might be helpful: http://www.wadler.org It lists Sails dimensions for all the MacGregor/Venture models. I just rediscovered it hidden in the many favourites of my browser as I am also looking for a Jib fo my V2-22.
Good Luck!

You pretty much answered your own questions. I'd suggest to dowload the manual of the V22 from the Resources section of this site, it has a pretty good drawing and explanatinson these keel bolts. Good luck!