If you would prefer the "in-the-track" style of window visors rather than the "stick-on-the-window-frame" type visors like the Toyota ones above, you can get these from Weathertech.com... they are sleaker-looking and low-profile, but they also cost a bit more, about $110 or so for the set of 4. I went with these because I have the xD Carbon Fiber B-pillar appliques, and I didn't want to cover them up with the stick-on style vent visors. These do not use any adhesive to install, you just bend and snap them into the window track and they stay in place on their own. I really like the looks of these over the stick-on kind...
