I knew they were going to make one! I was so tempted to do the hack instead but I waited.
Totally matches the rig, the only downside is you need to be careful unplugging both sides of the iTrip simutaneously, but there's no need to because the iTrip has plug-thrus for headphones and power at its bottom too.
(Intec makes a less stylish one but also comes with cup-holder adaptor, car seat headrest adaptor, and window suction cup.)