[Searching for AR D04-0009 Tweeter]

This is the speaker I’m working with

[Searching for AR D04-0009 Tweeter]

Just made this account because I am desperately trying to find parts for my discontinued speakers.

I just bought 2 of the same speaker (Advent 400CC) in order to have a backup. The tweeter dome in the first one was pushed in and the spider came out. I then discovered an oily substance in the magnet. Only tweeter I found very similar was the Acoustic Research AR PS replacement, but no one sells them.
 

Does anyone know where to look or how I should solve the tweeter issue in these solid/outstanding speakers?

 

THANKS!