Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
It is a small cylinder, it just has four tiny prongs inside it- I'll see if I can find a picture - this is from the UK, but it looks like the type I need - https://www.ebay.co.uk/itm/311988783666
I think your idea of having a shop put it in a new case and pull data off it is the way to go, though.
Back when this "died", I would turn the power on, and it would just be dead, no response of any type. Would that indicate that the data is gone, or maybe not? I assumed it was inaccessible after that point, but reading on this thread makes me wonder if that is the case.
If the power supply died the data on the disk will probably still be good and if you put it in a new case and it spins up you may be good. I think it is worth a shot.