If you're a budget-conscious shopper, this Topshop Blazer Jacket will fit the bill. It's a popular choice, while not very expensive. Another strong contender for your wardrobe is this Topshop Blazer. While the price of this product is not too high, it will definitely attract a lot of attention.
If you're looking for something in between pricewise, take a look at this Topshop Jacket. While the price is very reasonable, this piece is an easy wardrobe update.