The blazer is one of those wardrobe items that has all the potential to become your favorite. It will likely become your number one coat for the office.
If you're in a thrifty mode, this GUESS Vest will fit the bill. It's a foolproof choice, while not very pricey. Another nice option is this GUESS Blazer Vest. While the price is not too high, be sure that this item will become a worthy addition to your wardrobe.