If you just want custom keycaps for a modern MX board KAT Space Cadet was a group buy from over a year ago and it finally just started shipping. There are likely lots of people in /r/mechmarket that are going to be selling sets.

It has the sublegends on the top like the original but not the ones on the front side of the keycap (I don't think modern manufacturers are even willing to try that).

If you don't want to go with KAT Space Cadet, GMK has a similar set that should be shipping soon, if not now. Once again there will be people selling them on the aftermarket.