Dunno about Gator cases... but I'm going to presume they are similar to SKB in design.
Replacement latches are available; you may find 'em through a search. That said, I wouldn't replace the latches unless I knew they were damaged or worn. If it's a case of them not securing tightly anymore they can be removed and reinstalled slightly back from the edge. Drill out the mounting rivets.
If removal is necessary, you may replace 'em, secured with pop rivets or small button head screws with self-locking nuts. A shim may be needed to obtain the proper mounting.
Hope it helps.