I need an apartment style mailbox, multiple mailboxes adjoined, to use as a prop. I live in LA and figure that there must be a good place to find old props, etc. from old movies. Does anybody know of a place like this or any other source for a mailbox?

Any reason you can't use the real thing at someones apartment?

Ebay has a lot.

I need a mailbox that I can open the same way the mailman does, with the 'super' key that opens all of the connected mailboxes at once. More realistic and it would help with the scene.

There are a dozen prop houses in your town. Which ones have you contacted?