Mines costing me NZ$695, including shipping, which according to the FT currency convertor works out at £245 today, before import taxes of course.  That's from TotallyWired that Paul mentioned; a company which so far have been excellent in responding to e-mail questions etc. 

Thanks for the comments on the foam modding, I actually got round to doing this myself on Sunday.  I did do a little damage to the foam bits unsticking them, but they can still be easily glued back in place.  With the foam removed the sound is obviously clearer and brighter; whether they might actually be a little too bright I'll have to wait and see till I get my amp...