Originally Posted by g_taco

The closest thing to what you want that is out there is a Syntace STratos bar (or chuck's tsunami). THey have 20-25mm back sweep. The bar curves towards you, between the stem and the bend. The back curve is not apparent from most pictures, but you will get the idea in this pictures (http://www.trisports.com/synstratzer.html). It also curves a little inward in the straight region where you put your hands on, which is very comfortable on the wrist.
The 15degree one drops about 2 inches and 5 degree drops about 1 inch. Regardless of the drop and width the backsweep is between 20-25mm. I have 2 of these both in 5d and 15d and they are very comfortable and do not look awkward. Because of their unique shape the brake lever that fits best (in case you decide to use a brake) is the syntace space control lever.