If you're looking for a thrifty option, your best bet is this Bloomingdale's Coat. It's a wonderful product, while not very pricey. Another strong contender for your wardrobe is this BB Dakota Coat. While the price of this piece is rather reasonable, it will surely attract a lot of attention.
If you're looking for something in between pricewise, opt for this Elie Tahari Coat. While the price is very reasonable, this product is an easy wardrobe update.