There's a guy who stuck small convex mirrors on the side air vents. You can flip them to the inside to maintain a clean look.

 

These are great. Easy to install and your not tightening and loosening your door hinge every time. As far as rattle/vibration goes, there is less than what I experience on my motorcycle so to me it isn't an issue.

 

Justaddmudoffroad.com has a pair the go in door hinges,lock in with rare earth magnets.looks like they may work well but I just got the Olympics,

 

I bought a set of these yesterday. Should have them later this week. I will post up a short review on this thread with some pics once I get them in. I have tried three different types of mirrors and the all sucked. I figured I would give these a try. They have a 14 day return policy.