Can you get an old-fashioned metal oil drain pan? Or a good deep cookie tin? Or a cake tin? Anything with the right diameter and straight sides basically. Then you need to get an old hard drive. Easy to get, just ask around, especially at a computer repair place if you don't have the tiny screwdrivers you'll need to take it apart. I'm sure if you asked nicely someone wouldn't mind taking one apart for you to get at the spindle
There are other options but this is one:
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