That's absolutely reprehensible and most likely bordering on unconscionable behaviour. It's hard to believe.
The speakers are still being advertised on their own website:
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Why don't you try contacting the US sales managers for Revel directly? Pick one and CC all the rest in the email, you'd surely get a repsonse and likely help. Surely, there's a wrecked cabinet Salon 2 in a warehouse someplace they could pull a driver from. They are TOTL speakers- they must keep spare parts.
From the revel website:
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That's what I'd be doing. I'd probably also relate my experience in this thread.