I did a little research and was able to find that our trannies were almost the same as the 6spd Scion TCs, w/o much thought I ordered the below item and retrofit it to work on my Camry w/o any modifications at all, I haven't tried it on anything else but the 2011 6spd Camry SE. If you try it on the other models you can tell me if they work or not. Below are some pictures. Installation is pretty simple, if you look at these pictures, you can do this in less than 30m.
TRD QUICKSHIFTER - 6-SPEED MANUAL