My covered sideway has a very old door mounted on a pin and strap hinge.
Somewhere over the decades/centuries the bottom fixing has worn to
give significant play (a mm or 2 around the pin), leading to the door
dropping. It doesn't look like the strap has opened, so I guess the
problem is just wear, possibly on both parts.
A previous owner clearly bodged this by wrapping some fairly stiff
plastic around the pin but this has now gone brittle and worked its way
out, with the result that the tongue of the yale-type lock doesn't
engage. Although lifting the door on closing it deals with this, I seem
to be the only person who can do this (!)
For the moment, I've repositioned the lock keep to make it work, but
this will get progressively worse.
I've scoured all the sources I can find for a similar hinge but no joy,
so I'm wondering what my options are. I could repeat the previous
bodge, if I could think of a tough enough plastic strip, but I haven't
had the necessary inspiration yet.
I suspect it would be simpler to just re-jig the frame and use
conventional hinges than to do any over-elaborate metal work, but I
wonder if anyone has any bright ideas for fixing this.

Cheers