First off, I can't remember which one actually worked, but it was one of the 3 in the 3MF file (for the STL, when you slice it, the flap style clips should be floating, one of those 3 is correct)

This is a very butchered chop-and-change style remix of the original STL for the top row keycap. It's definitely not to factory spec, but I've been using it for over a month now, and it hasn't fallen apart yet.

I highly recommend using the 3MF file since that has all of the settings I used to get my keycap working. It's been a long process with a lot of trial and error (as seen in the one picture). Be careful when fitting the keycaps, as the small clips can snap off quite easily if forced.

I have also included some pictures of the underside of the original keycaps if anyone wants to tinker further. Unfortunately, this STL doesn't have the little indent that the original caps have, but my attempt to get that in was very much unsuccessful.