Orange Pea Coats from farfetch.com
If you're not planning on spending much, this Peacoat will fit the bill. It's a foolproof choice, while not very expensive.
If you're after a bargain, look no further than this Tomas Maier Pea Coat. This item doesn't cost the earth, but absolutely invaluable in your wardrobe.
If you can afford to splurge, then what you're looking for is this Jil Sander Peacoat. It's more expensive but worth your money.