Oxfam online shop www.oxfam.org.uk/shop has a 50% sale on where you can pick up some fantastic bargains on all of its second hand stuff. here are a couple of things I found, but there's loads of choice.
http://www.oxfam.org.uk/shop/second-hand-clothes/105823
http://www.oxfam.org.uk/shop/second-hand-clothes/110029