I have a door latch for the passenger side door that you could have but I don't think that would help you any. I do have a set of door hinges you can have if you need them. The hinges are used but they are pretty tight still. I think one of them has a little play in it but not to bad. Here is a link to a door latch for $35.00.
http://www.ebay.com/itm/50-51-Chevy...ries&vxp=mtr&hash=item43abc9a9db . I have not seen any rebuild kits out there for door latches, not saying there isn't any. But for what you can buy a new one for. And the peace of mind knowing that the door will open and close properly. You might be better off just buying a new one.