Clip ons have grown a lot. Manufacturers are realizing that people want options, and I'd say you have two options, unfortunately they both probably require a change in stem.

First, is the Oval concepts face plate system. This would require an Oval concepts stem and one of these systems... http://www.universalcycles.com/shopp...s.php?id=30094

Second, is the Profile design Lightning Strykes(theres 3 types) and the accompanying Profile Design stem - http://www.profile-design.com/produc...g-stryke-race/

Tough call though, each has their merits and downfalls.