For those of you looking for a vest pattern - I've found one that works well, with a few minor alterations! I've just finished a muslin prototype and it turned out great ... ( except for the mistakes I made! ;) )
It's a vest pattern made for leather (not fabric) and has a front zipper. The pattern has all sizes printed on the paper, so it's easy to adjust and alter for your shape/size. There is a separate lining pattern as well.
As for the adjustments: The pattern has to be lengthened about 2 to 3 inches (no big deal), the front collar has to be brought up and you have to make your own shoulder flap pattern piece (also no big deal). And remember to sew the lining to the leather on the sides - and not to each other!
Best of all ... it's on sale right now! :D