Actually the company that will be able to help you is OWC AKA MacSales they do all that stuff see here:
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OK I am old enough to remember those but I would not have any of that info or software I was just trying to steer you to people who can help you.. They could not help you? I am surprised at that ok. I will opt out.
You can still get the CPU Director which as I recall is the software that ran the upgrades here: