there were "Ace bars" years ago! They were very popular with the "Cafe set who didnt want the radical position that clip ons gave! They had the same droop on the bars but were a one piece affair that mounted where the original bars did in the clamp set up!
They could even be inverted and used that way as well to give even more options!
Here is a pic of them on a Triumph to give you an idea!
http://www.bellacorse.com/bcc039.htm