its an easy fix, if your any bit handy you can fit them yourself,. you can buy them in main dealer for like 1.50 per one tops id say,
take the caliper and disk off the car, get a hammer pop out the old ones and when fitting the new ones get an open nut an thread it in, as when the nut tightens it will pull the new stud into place.
hope this helps.
ive had the same problem with my old ae11 some dope cross thread most of them so i changed them all.
only a few weeks abo did some on a friends evo so i can imagine a s14 is the same..