Okay, I bought the same passengerside mirror, and found out the same...
Here's what to do :
In the mirror there is a thin ring, which you have to remove..
After that you can remove the mirror (there is actually two on top of each other)- then you can clearly see, below, that two small screws are holding a bracket tight to the ball that the mirror rotates on.. -these screws should be removed, and will proberbly break, but if they do, you should make some new threads, where they were..
-Now comes the fun part, -use a pair of pliers to bend the ball, and you should proberbly use a small tourch to heat it up..
If that also breaks, you should drill out the part left in the mirror-holder.. And then drill some threads in it, and THEN install a prebent new bolt with a round head ( The same bolts that are used to hold small gasshocks on fx. rear hatchbacks)
I know it may be difficult, but I learned the hard way, because I just bent that stupid piece of...... until it broke, -but now it's perfect)
