i've finally managed to order a wii fit after 3 weeks of trying to find it in stock for a reasonable price (as most sellers have it for over £100 and rrp is £69.99).
this is the website i used http://www.wii-consoles.co.uk/wii-fit-in-stock.asp
they check stock on all the big suppliers websites.
i still had to buy it as part of a package but managed to get a package with games instead of stupid accessories that i don't need.
i'm so excited - should be here this week!