I purchased new TJ mirrors from
Quadratec.
I wasn't in the mood to drill a bunch of holes in my windshield frame, so I splurged
bought some of Sun performance's mirror movers (also from
Quadratec).
A picture of just the mirror mover is to the left.
It can be really difficult to get the old Torx bolts
out. If they break, you may have to drill them out.