If you're on a thrifty budget, this Topshop Jacket will fit the bill. It's a great choice, while not very expensive. In this price range, you can also look at this Topshop Blazer. It's also a popular item and won't break the bank.
If you're looking for a happy medium, why not look at this Topshop Blazer. While the price is very reasonable, this piece is an easy wardrobe update.