eBay is the place to look for those spare parts, not Amazon. You'd be amazed at what people sell there if you haven't taken a look for a while. When items are "sold for parts or repair" that means the party buying it is likely to disassemble the item to sell the components online. I've repaired a number of things that way, and have sold parts that way myself.

I have a lovely green enamel coffee pot with a fancy fitted perk top that sits on top of my cupboards like a piece of art. I'd guess it's 100 years old now, and I'd guess it still works. I don't drink coffee, though, so I haven't tested it.