If the locks in the doors are actualy connected, move the lever the opposite way to what you would when opening, like dundee said.

If its a single circuit, i would say yeh it is the same. Shouldnt be expencive new, and probably a good idea too!

what year is the car? I know sedans change mid run. I have 1 sedan tail light lens i think.

Rust free isnt a rare thing in 1000s!

Never seen any castor rod mounts broken! My rods were nearly rusted through tho! So its been torn off the sub frame? The front mount im assuming? Maybe just bang it back in place and re-weld it up?

NFI on the boss kit