If you're in a thrifty mode, this St. John Blouse will fit the bill. It's a popular choice, while not very expensive. Another strong contender for your wardrobe is this St. John Coat. While the price of this product is rather reasonable, it will surely attract a lot of attention.
If you're a bargain shopper, take a look at this St. John Blouse. While the price is very reasonable, this product is an easy wardrobe update. Another good option is this St. John Gown. It's an attractive option both price and quality-wise.
If you can afford to splurge, then what you're looking for is this St. John Tunic. It's more expensive but worth your money. Another product we're drooling over is this St. John Jacket. It's costly but you get what you pay for.