I checked out eBay and there is no end to the Exabyte drives available there.
I'm in Maryland and the first big Hamfest (Amateur Radio flea market) of the season is less than two weeks away. I always see Exabyte drives there, often by the boxful
If the needed drive can be identified, I'd be glad to try and find one, test it if successful, and donate it to the cause. Maybe AdPro can get an update before the next 17 years!