Hi Guys,
I've finally taken the plunge and ordered a proper concentrates rig from the US via ebay,
http://www.ebay.co.uk/itm/331181532044?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
I spent ages looking online for places in the Uk but obviously couldn't find the right search terms...