if you're in a thrifty mood, your best bet is this The Great Vest. It's a great product, while not very costly. Also take a look at this Theory Vest. It's a product you'll fall in love with which also doesn't cost a fortune. You might also want to consider this Diesel Vest. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you want to splurge on a luxury piece, then what you're looking for is this Faith Connexion Vest. It's more expensive but worth your money. Why not take a look at this Balmain Vest too? Expensive, but worth every penny. And one more item you might be interested in is this Fabiana Filippi Vest. 'Cause you deserve nothing but all the finer things!