Alternative keycaps

Has anyone created any alternate keycaps for the Model100?

I’d like a set with:

  • concave keycaps for the thumb row. My thumbs tend to slip of center with the current convex design.
  • some of the edges/wings removed from the alpha keys. I find the keys are sculpted strongly in the columnar directions so reaching across columns takes a bit of unnecessary vertical motion.

I imagine the only option is to 3D print something.