If you're on a thrifty mission, check out this Theory Blazer. It's a popular piece for a good price. In this price range, you can also check out this Kensie Blazer. It's also a popular item and won't break the bank. You might also want to consider this BCBGeneration Blazer. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you want to splurge, then what you're looking for is this Blazer Jacket. It's more expensive but worth your money.