Have you ordered it already? As I know a US site that allows you to choose the colour of your wheel, ships cheaply to the UK and the wheel comes ready assembled!
I think it cost me around £16 including postage which isn't bad.
Here is the link if you need it:
Wodent Wheel International Ordering
To order, ignore all of the icons and scroll right to the bottom where you will find 4country links:
Canada
South America
Asia
Europe
If you click Europe you can order and I think my mum paid via paypal.