If you're on a thrifty mission, your best bet is this Deepa Gurnani Blazer. It's a popular item, while not very expensive. Another smart option is this Gemma Jacket. While the price is rather reasonable, be sure that this product will become a valuable addition to your wardrobe.
If you're looking for a happy medium, you're in luck with this Helmut Lang Blazer in stock and waiting for you. You are guaranteed to love this product. Also look at this DKNY Blazer Jacket. It's an attractive option both price and quality-wise.