These (Massdrop) would be custom-made, do you think?
That they exactly fit a (more or less) TKL keyboard seems suspicious, given the lengths that some steam punk players go to to make actual archaic typewriter keys fit a modern keyboard.
If so, perhaps there will be a drop or something for the keycap sets.
They'll need up to 397 sets of the keycaps as it is, just for this drop!