Rear bumper sag

:
83 RX-7 Gsl, 2000 Mazda Protege LX, 2011 Mazda3 Sport i
Is there any solution to the sagging rear bumper? It obviously because the socket for the pin or bolt rusts out of the top. Mines pretty rusty so I’m afraid that drilling into the panel to add a zip tie may add a bigger issue.
 
Back