To be honest you could be tracked by your WiFi usage too.

Just checked what I last ordered from Aliexpress and it was YMDK DSA. So far content with those and I’d assume the XDA profile keysets are just as good. YMDK also has got their own direct sales from their website and probably some of your local stores sell them too. Aliexpress and Amazon are in many ways possibly hit and miss, so I get your sentiment toward those. Personally I prefer not to use neither of those, for reasons that are not so much about the quality of stuff on sale there.

This is also dependent on the layout, but judging by your lingo and question I assume US/ANSI+QWERTY