They can be bought from all kind of places, I'm on it as well now, refurbishing a vintage 60s handmixer.
I know some sellers need product serial number and if you don't have that (I don't) then it's more problematic.
Especially problematic if your device is older like mine.
What we need to find is a motor drive train cog gear manufacturer, that could produce custom made tailored, so we could send one gear wheel to them and they would produce.
Maybe there are 3D molding/printing services, as 3D printing is the standard today of so much?
On it now. Let's hope we don't need to buy Cheap-China-plastic. Ideal of course would be to find metal gears, that would last whole life (if not motor breaks).
I also need to find a manufacturer of cog drive train wheels, that could do custom made, tailored, because if you refurbish a vintage handmixer you need parts that are not manufactured or in circulation anymore.
I'm refurbishing a vintage handmixer from the 60s, those here looks like they have same gear cut pattern but of course here we need exact replacements and no guessing.
Anyone knows the most specialized and broad range mixer replacement part manufacturer?
I will post also about this, but thought as I'm in the correct category here I could ask.
My handmixer is on Deutsche Kunststoff Museum with search word "ABC MIX" it's a German vintage handmixer and only problem is the drive train wheel cog gears that should be nylon I think, not plastic not metal (sadly), so they deteriorate.