For anyone looking to buy in the UK, the cold smoke adaptor is available by telephone but won't be available online for another couple of weeks.
I have just bought one, cost was just under £87 including VAT and delivery from the UK Bradley Smoker agent. Lady called Sam was very helpful. :)
Contact her on 01803 712712 between 9am and 3pm.
I am doing a cold smoke in the next few days and my cardboard box has fallen apart, saves me the bother of getting another one!! :D