well my 97 geo metro had the same problem, but it was 3 of the 4 studs that did it. i bought factory replacements, pressed them in the little they would hold then welded 3 small but deep tack welds on each stud. matter of fact i did all 4 of them. no problmes after that.
now, if it was on a 14 bolt FF i would say find larger ones. napa has a great book for finding stuff like that.
Grant