I got mine from Clean Your Car as you have to get the correct connection for your pressure washer, it was about £50 or Halfords do the cheap plastic Karcher one for about £18, which works well, I have one you can have for £10 that has been used once as I have now bought the Autobrite one
http://www.halfords.com/webapp/wcs/s...egoryId_165569
Paul