I had to order it from Model Zone. They apparently have been building a web site for what feels like ages. It is costing £39.99 which is pretty much the going rate. However, keep an eye on the sales. Model Zone regularly have selected Auto Art models' on 50% sale.
gis and I were looking on e-bay, you can pick them up there, but they tend to cost a bit more as there is postage to think about. I think a Black Lambo came to £48.00 instead of £39.99.
Keep an eye on:
http://www.modelzone.co.uk/