At the Top Cycle Shops
These are aimed at competitive cyclists for whom aerodynamic performance is paramount and this level of design for speed doesn't come cheap. The Noah is the choice for very fast road racing, ranging from around £2500 to £5500 and comes with all the established low drag design points that you would expect.
If you're in top level TT or Triathlon events, the Dean is specifically designed for that, although you might need some sponsorship to afford the price tag.
We searched the following retailers, but unfortunately none of them currently stock this item: