Fix for a droopy rear view mirror?

[RikRok]

It seems every time I hit any type of bump my rear view mirror points south. There are no adjustments for tightening as it is just a ball mount. Has anyone found a fix for this, other than replacement?
Thanks

 

[GTSnake]

They are standard Chrysler issue. You can pick one up at a junk yard or any reseller. You can also upgrade to an aftermarket one with temperature, compass and auto dim.