Well, you could always fix the mirror or replace it with a new one. Otherwise you could get a relocation bracket and install that. Only problem is those windshield hinge bolts are a PITA because they are torx and the nuts are covered in body sealer. Another option I've seen is to take the mount for the stock mirror and drill and tap three holes into the windshield hinge itself. Or you could go with CJ style mirrors.
Personally, I'd try tightening the stock mirrors or else just replace them.