Oh man, I just purchased this: still awaiting its arrival though. I tried it on in store a few weeks ago and it does look lovely!
There's this at Mango for £60+
shop.mango.com/GB/p0/mango/clothing/jackets/zipper-jacket/?id=61103777_OW&n=1&s=prendas.americanas&ie=0&m=&ts=1337624937027
To be honest, anything of a similar style and colour in most of the high street stores seems to cost around £50-£80 anyway. The Zara jacket is predominantly cotton, which is great, but also dry clean only, which is terrifying. Perhaps try ebay for Zara fantasy blazers? They usually have some knocking around there, for they have been selling this style for quite a while now.
Even NewLook and Amazon didn't present me with anything much cheaper, unless we're talking denim.
I did hang around trying to justify my own purchase for a few weeks until finally caving in. I have been wondering how to style it, for although I love the idea of it with jeans, I hate showing my backside, especially in skinnies. Considering wearing with skirts and maybe jeans when I'm feeling confident. Lovely for summer into autumn too.
Hope someone can help!