Have you tried unlocking the ROM with the latest PC-3000? I know they have a newer, second unlocking method which I've never yet needed. If you can unlock the ROM and get terminal access, then things might be possible.
Regardless of having a utility, you can do a lot over terminal. But you first need to investigate whether the ROM unlock is supported to get terminal access. I've recovered plenty of Seagate drives that PC-3000 didn't have utilities for by just using terminal commands.
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