If your hinges are just loose versus missing or broken I like the mod where you drill the hole a little bigger, use a stainless 5/16 inch bolt, plus drill the center (male) part of the hinge a little bigger and use some sort of nylon bushing in that part. You can buy this mod from OD Iron but you can do it a lot cheaper thru a good local hardware store. Just be sure you use a nylon lock nut so it doesn't come loose. Or if really handy you could use a long rivet.