One thing nobody mentioned, and this is just the cheapo-bottom feeder coming out in me, you can simply unscrew the safety lever and remove it. Then take out the little cross piece that it was attached to and file/grind it level with the lever body. Top it off with a set of non-aero hoods from the LBS for around $7-8 and you've made your bike about 1000 times more comfortable.

Of course, if you have your heart set on aero levers, this is no good. Also it requires a modest amount of mechanical aptitude. I do this modification frequently on bikes that pass through my garage. A worthwile, cost effective modification.