You can buy hinge kits by size at the local FLAPS in most locals.
Find one the size you need, cut it off for length and get to it.
Make sure your hinges are trued up first.
Find the worst offending hinge for wallow and find the smallest size drill bit needed to clean it up (back to true cylindrical form).
Then see what the next closest Pin kit is.
Drill all the hinges out to the new spec and have fun.
