Which models are compatible for replacement of the top case?

Hey guys,

I was wondering which models are compatible with my version of my MacBook Air. I have an early 2015 MBA, which I unfortunately spilled coffee on.

After having everything cleaned up properly, luckily everything works just fine, just some buttons on my keyboard quit their jobs. I believe both the keyboard and the keyboards's input socket on the trackpad are broken. I could attach photos, if you guys need it.

Since it's the easiest way I want to replace the entire top case, however on Ebay I can't seem to find (used but original) 2015 top cases.

On this site it says they're all compatible throughout 2013-2015, however the screws for almost everything inside have different lengths in the latest MBA.

Can I still take whatever generation until it's from 2013-2015?

And also, what do you guys think about the "new" products from China? Can they be safely ordered? Anybody here who has any experience with that matter?

Regards from Germany,

Nils