Actually you can take the passenger vent out rather simply by yourself and without the help of the dealer.
Wedge a screw driver between the vent and the dash (don't worry you won't misform the dash) at the 5 and 7 o'clock positions there are two pressure tabs. Once you have the screwdriver wedged between the vent and the dash, push down to release those pressure tabs. you may have to move the screw driver around, but that's all there is to it.
Don't ask how I figured this out, I still say it was the fever (103) and lots of cough medicine that I was on, when I got mad at it and got it out my way.