If you're not planning on spending much, your best bet is this Soia & Kyo Coat. It's a wonderful piece, while not very costly. Another great option is this Rachel Pally Coat. While the price is competitive, be sure that this piece will become an excellent addition to your wardrobe. Or you can choose this Club Monaco Coat - be sure you'll be making a stylish addition to your wardrobe.
If you can afford to spend a little more, look no further than this Vince Coat. This item doesn't cost the earth, but absolutely deserves a spot in your wardrobe. It's also worth considering this April May Coat. This piece is ultra popular and, just as importantly, not too pricey. Look at this Mackage Coat too! Great value for your money.
If you're not the one to skimp on clothes, then what you're looking for is this Edun Coat. It's more expensive but worth your money.