You can get Lumigan without prescription from inhousepharmacy.co.uk, very reasonably priced.. there was another site, I think it was a US one, that also sells it without prescription.. That one I've mentioned sometimes runs out of stock of the Lumigan tho (not surprising given the price) so wouldn't wait around too long..
I've also got a spare bottle, have tried a little of it but there is plenty left, if anyone in the UK wants it for free just pm me :)